1993 Corvette guide: the Ruby Red 40th Anniversary, the 405 hp ZR-1, two GM campaigns and 2026 prices

Chevrolet’s order guide, revised August 31, 1992, lists the package as RPO Z25 (RPO is GM’s regular production option code) at $1,455 (page 99). It brought Ruby Red paint, Ruby Red leather sport seats with special embroidery, a power passenger seat, ruby inserts in the wheel centers and chrome-colored emblems on the hood, the fuel door and above the gill panels. It required Preferred Equipment Group 1 ($1,333: electronic air conditioning, the Delco/Bose cassette and a power driver’s seat), so every 40th car has both seats powered. Convertibles got a Ruby Red soft top (press kit, page 108). The package came on the coupe, the convertible and the ZR-1, where Car and Driver reported it cost nothing extra, and in one combination only: Ruby Red paint over Ruby Red sport seats.

No GM document read for this guide splits the 6,749 by body. Corvette Action Center counts 2,179 Ruby Red convertible tops, citing the Black Book, though its top counts add up to 20 more than the convertibles built. By this site’s arithmetic, that puts about a third of the 40th cars in convertibles: an estimate, not a production figure.

Chevrolet leaned on the birthday all year. Its June 2, 1993 release (page 42) called the package “highly popular,” counted 1,016,981 Corvettes built through April 30, 1993, and put sales that model year up more than 20 percent.

How to tell a real one. Start with what proves nothing. The “40th” embroidered in the headrests went on every 1993 with leather seats, anniversary car or not; only cloth seats went without. The chrome-colored emblems and ruby wheel inserts came only with the package, but some regular-car owners add them later, owners in a CorvetteForum thread on the 40th (opens in new tab) say.

The proof is on paper. GM’s Service Parts Identification label, a sticker listing every RPO code the car was built with, sits on the floor console door of a 1993 (page 19). A real 40th car shows Z25 and the paint code 68U, “Anniversary Ruby Red” on GM’s RPO list. Then check for Ruby Red sport leather and, on a convertible, a Ruby Red top. Ruby Red left the chart after 1993 (1994 kit, page 16), so a Ruby Red C4 with any other model year in its VIN has been repainted.

Chevrolet’s press kit gives the 1993’s announcement date as September 24, 1992, and the Black Book page calls its exterior “virtually unchanged.” The work went under the skin.

More torque, less noise. A shorter intake duration on the LT1’s camshaft raised torque 10 lb-ft, to 340 at 3,600 rpm (press kit, page 110). Softer exhaust lobes cut exhaust valve closing speed by 20 percent, composite rocker covers on bigger rubber isolators replaced 1992’s magnesium ones, and two-piece heat shields went on, all to quiet the engine. Horsepower stayed at 300.

Staggered wheels. “The ride and handling of the ZR-1 inspired the engineers,” the press kit says (page 106), to give the regular car narrower fronts: 17 x 8.5 in wheels on P255/45ZR17 tires in front and 17 x 9.5 in on P285/40ZR17 at the rear. The 1992 ran four 9.5 in wheels. The Z07 handling package kept four 9.5s on P275/40ZR17 tires.

Passive Keyless Entry. The press kit calls it GM’s first. Walk up with the transmitter in a pocket and the driver’s door unlocks (or both, as set) and the interior light comes on; walk away and the doors lock and the theft deterrent arms, unless the key is in the ignition. The owner’s manual says each car came from the factory with one transmitter (page 46) and gives a range of 3 to 7 ft depending on the antenna.

Smaller things. Torch Red joined the color chart and Competition Yellow returned; GM’s papers call both new for 1993, though 278 1990s had worn the yellow before Chevrolet stopped painting it (the 1990 guide has that story). The optional low tire pressure warning changed frequency to meet Canadian rules, and the ZR-1 got 405 hp (see The ZR-1’s first 405 hp year).

What stayed. The 1990 dashboard, with one airbag, the driver’s. Black cloth seats as standard. A four-speed automatic that wasn’t yet electronically controlled, and an LT1 that worked out its air by speed-density rather than measuring it.

What came next. The 1994 Corvette added a passenger airbag, sequential fuel injection and the electronic 4L60-E automatic, and dropped cloth seats, Ruby Red, Quasar Blue and the Arctic White interior. A 1993 is the last LT1 car with the older cabin and the simpler engine management.

How much horsepower does a 1993 Corvette have? 300 hp for the LT1, 405 for the ZR-1. The press kit and GM’s MVMA specification sheet of September 1992 (page 177) both put the LT1’s 340 lb-ft at 3,600 rpm, as the 1995 guide notes; the 4,000 rpm on Corvette Action Center’s 1993 page isn’t GM’s.

Sources: press kit pages 109, 110, 111 and 120; MVMA sheet pages 177 and 178.

How fast is a 1993 Corvette? No GM 0–60 time or top speed for the 1993 turned up in its kit. The dealer book did something better for a salesman: a table of “competitive specifications,” with figures it says were “gathered from various automotive periodicals” (page 53). The $35,145 Corvette coupe, six-speed, ran 0–60 mph in 5.2 seconds. A $55,525 Porsche 911 Cabriolet took 5.3. A $38,005 Nissan 300ZX Turbo took 5.7. Motor Trend’s own 1993 test of an LT1 six-speed, reprinted in the kit, got 5.6 seconds and a 14.0-second quarter mile at 101.7 mph. Twenty grand less than the Porsche and quicker on the dealer’s own sheet: the Corvette bargain in one row.

Gearboxes and axles. The automatic was standard; the six-speed cost nothing extra and went on 5,330 cars, 448 of them ZR-1s, which had no other choice. That leaves 4,882 six-speed LT1 cars by this site’s arithmetic, fewer than one LT1 car in four. Automatics ran a 2.59:1 axle, or for $50 the G92 performance ratio (3.07 on a coupe, 2.73 on a convertible), which required the FX3 or Z07 suspension. Six-speeds got 3.45:1 (order guide, page 96).

Fuel and fluids. The owner’s manual calls for premium unleaded at 91 octane or higher (page 242) and oil meeting GM standard GM4718M, which “may be identified as synthetic,” in 5W-30. Capacities from page 312: 4.5 qt of oil with the filter, 17.8 qt of coolant, a 20.0 gal tank, and wheel nuts torqued to 100 lb-ft (140 N·m). EPA estimates were 17 mpg city and 25 highway, preliminary, in the press kit.

What did a 1993 Corvette cost new? $35,145 for the coupe (order guide, page 99) and $41,745 for the convertible (page 97), destination included. Without the $550 destination charge: $34,595 and $41,195.

The options worth knowing, with Chevrolet’s prices and the Black Book page’s counts:

Corvette Action Center’s 1993 production page (opens in new tab) matches the Black Book page row for row except AR9, where it counts 8,509.

Z07 is the hardware to look for: FX3 plus stiffer springs, shocks, bars and bushings, heavy-duty brakes and an oil cooler, “intended for showroom stock and gymkhana competition,” the press kit says.

Black cloth seats were standard, in black only. An Arctic White leather interior meant white seats and upper door panels, the rest black.

1993 Corvette colors. Ten, by the Black Book page’s count of 21,590 cars:

Convertible tops on regular cars came in black, white or beige.

The ZR-1 package cost $31,683 on top of a coupe, $66,278 before destination, and 448 were built. Its LT5 went from 375 to 405 hp at 5,800 rpm and from 370 to 385 lb-ft at 5,200, by the press kit (page 104), and gained four-bolt main bearings, platinum-tipped plugs, linear exhaust gas recirculation and a Mobil 1 fill. A real one is a YZ in the VIN’s fourth and fifth places with a J in the eighth, rides on P275/40ZR17 and P315/35ZR17 tires, and is about 3 in wider from the doors back.

On Bring a Trailer in 2026, two 1993 ZR-1s sold: $26,500 and $57,500, the second a 904-mile 40th Anniversary car. Hagerty’s October 2026 #3 value is $21,400, or $23,500 with the 40th package. Everything else, from the LT5’s weak points to telling a real car from a clone, is in the C4 ZR-1 guide.

93C02, the power steering hose. The one federal safety recall. NHTSA’s record for 92V160000 (opens in new tab) says the LT1’s power steering gear inlet hose could fracture and spray flammable fluid into the engine compartment, a fire risk, on 5,152 cars across 1992 and 1993. GM’s dealer campaign, 93C02, limits it to “certain late 1992 and early 1993” cars; for 1993, serials P5100039 through P5102533. An improved hose was the fix.

93C17, the rear U-joint bolts. A GM product campaign, sent to dealers on June 1, 1993, that isn’t in NHTSA’s recall file: some 1993s had under-torqued rear wheel shaft U-joint retainer bolts. Dealers re-torqued them, or replaced bolts and retainers found loose on cars past 25 miles. The range was serials P5116031 through P5117466, plus ZR-1s P5800323 through P5800371, and 263 cars in it were fixed before they shipped, by GM’s bulletin as Corvette Action Center transcribes it (opens in new tab). On a car in the range, ask for proof.

Fixed on the line. GM’s bulletins put serial numbers on several running changes, so a later car is the better-sorted one:

• Accessory belt (93-273-6A). The double-sided serpentine belt of 1992 and early 1993 could fray and get noisy. From the week of March 22, 1993 (serial P5113150), cars got a single-sided system; converting an earlier car takes a belt, tensioner, power steering and idler pulleys and a different alternator.
• Hood latch (93-151-10). Before serial P5110787 (ZR-1 P5800217), the release cable could slip off the latch and leave the hood stuck shut. New latches are GM 10210747 left and GM 10210748 right (OEM).
• Brake fluid sensor (93-224-5). An oversensitive level sensor could set a false code 83, lighting the brake and ABS lamps. A revised reservoir went in from serial P5114078.
• Right door glass (93-192-10). Early glass with the date code TA-3 had the wrong curve and wouldn’t seal; some cars between P5103330 and P5103622 also need a new regulator.
• Six-speed clutch housing (37-71-40). On six-speed LT1 cars from serial 110966 through 113902, housings cast from January to March 1993 could have a mislocated pilot bore: whine with the clutch engaged and, eventually, sheared clutch disc rivets. The fix is housing GM 10126448 (OEM).
• Automatic (93-228-7A). 4L60s built before November 19, 1992 could click or whine in third and fourth.

NHTSA’s file holds 22 owner complaints against the 1993 (opens in new tab), filed from May 8, 1995 to July 2021. The file opened in September 1994, when every 1993 was a year old or more, so it says nothing about the cars when new. That’s about one per 1,000 built; the 1992 has 7 and the 1994 has 35.

By this site’s reading, four describe brakes (a detached caliper, a pedal to the floor, a cracked booster), three the Opti-Spark distributor, and two more undiagnosed stalls. Four records describe unintended acceleration or a stuck throttle, two of them probably one car (filed the same day for the same incident); none led to a recall or GM finding. Two describe power steering hoses failing after the recall years, two fuel lines, and five are one-offs, including an airbag that fired without a crash.

The Opti-Spark. The 1992–1994 LT1’s distributor has an unvented cap that trapped moisture, Engine Builder reports, and it sits behind the water pump, so a leaking pump soaks it. The C4 hub’s Opti-Spark section has the full story and bulletin 87-65-27.

The engine computer. Owners single out the ECM used on 1992–1993 Corvettes (and the 1993 F-body LT1): it can quit when hot, light SERVICE ASR and refuse to restart until it cools. The fix they describe is a rebuild that reflows cracked solder joints ($189 plus shipping, one 2015 thread says), and a 2024 thread adds that the part is hard to find. No GM bulletin on it turned up.

Keyless entry. The PKE module is 33 years old. When one 1993 owner’s quit, members in a 2021 CorvetteForum thread (opens in new tab) offered a self-test and the bad news that the module sits under the dash pad, which has to come out. GM’s bulletin 63-90-09 covers short range on 1993–1996 cars, often from phones and laptops plugged into the car. Keyless entry only locks and unlocks: a no-start is PASS-Key’s department, owners in a 2020 thread point out.

The battery sits where every C4’s does; the battery guide shows where and what size. A car that sits belongs on a battery maintainer.

The VIN, from GM’s chart (page 8), with serial ranges from the Black Book page:

A 1994 carries R in the tenth place and a 2 in the seventh, for its two airbags.

The engine. GM’s partial VIN stamp on the block reads 1 (Chevrolet), P (1993), 5 (Bowling Green), then the serial (page 10). The Black Book page lists suffix codes ZVA for an automatic LT1, ZVB for a manual one and ZVC for the LT5, and block casting 10125327 for the LT1. A cracked cowl is a tell that an engine or transmission has been out of a 1992–1993 LT1 car, GM bulletin 93-134-10 says, and worth a question.

The label. The console-door Service Parts Identification label is the proof for Z25, Z07, FX3, G92, MN6 and the paint code, whatever a seller’s ad says.

Outside and in. A 1993 looks like a 1992 from the street; both have straight strakes behind the front wheels and two rectangular exhaust tips. Staggered 8.5 in and 9.5 in wheels point to a 1993 over a 1992, but a Z07 car has four 9.5s, so check the label. Inside, cloth seats or the single-airbag steering wheel rule out a 1994; “40th” in a leather headrest rules out a 1992. Factory Ruby Red or Torch Red rules out a 1992 too.

1. Campaign proof. For serials P5100039 to P5102533, the 93C02 hose; for P5116031 to P5117466 (ZR-1 P5800323 to P5800371), the 93C17 U-joint bolts. Ask for the paperwork: 93C17 isn’t in NHTSA’s file, so a recall lookup won’t show it.
2. Opti-Spark and water pump. Dated receipts for both, coolant weep at the pump, and no misfire or stall when hot.
3. A hot restart. Drive it to full temperature, shut it off, restart it. SERVICE ASR and a no-restart point at the engine computer.
4. The belt. Serial P5113150 or later, or a converted single-sided belt; a frayed double-sided belt means the conversion is still to come.
5. Keyless entry. How many transmitters come with the car (it left the factory with one), and whether the doors unlock and lock as you walk up and away.
6. Power steering. Look for wet hoses and fluid on the exhaust; two owners told NHTSA of hoses failing years after the recall.
7. Brakes. A firm pedal, the ABS and brake lamps out, and on a lift, the caliper pins and clips and the booster’s casing.
8. The gearbox. On a six-speed in serials 110966 to 113902, listen for whine with the clutch engaged. On an automatic, clean shifts into third and fourth.
9. The 40th, if it’s sold as one. Z25 and 68U on the console-door label, Ruby Red sport leather, and on a convertible, the Ruby Red top.
10. An inspection by a shop that knows C4s, plus the rest of the C4 checklist.

How much is a 1993 Corvette worth? About $14,000 at auction for an LT1 car. From January 1 to October 22, 2026, Bring a Trailer (opens in new tab) recorded 13 sales of 1993 LT1 cars at $9,900–$30,000, a median of $14,250 by this site’s count of sold prices without the buyer’s fee. Eight were 40th Anniversary cars, with a median of $14,625; the five regular cars made a median of $13,250. The top sale, $30,000, was a 9,000-mile 40th six-speed coupe with a Greenwood body kit its listing says was fitted when new. Two “40th Anniversary” Snap-on tool trolleys are left out. In 2025, 21 LT1 cars sold for a median of $13,650. Samples this small are market color, not a valuation.

Hagerty’s October 1, 2026 guide (1993 values (opens in new tab)) prices six-speed cars and takes 10% off for the automatic:

What is a 1993 40th Anniversary Corvette worth? By Hagerty’s October 2026 guide, only a little more than a regular 1993. The package adds $300 to a coupe and $500 to a convertible in #3 condition, $400 and $1,400 in #2, and $600 and $1,900 in #1. In 2022 Hagerty had the gap at about $3,000 (the C4 hub gives that figure). The coupe’s #3 value fell 6.2% on the quarter. classic.com’s 40th Anniversary benchmark was $16,003 on October 12, 2026, against $16,007 a month earlier. These are dated values, not a forecast.

On a 1993, the serial number matters more than the paint. From P5114078 on, a car left Bowling Green with the single-sided belt, the revised hood latches and brake fluid reservoir, and a clutch housing from after the bad batch. Make it a six-speed, the gearbox fewer than one LT1 buyer in four chose, with 93C17 paper if the serial falls in that range and receipts for the water pump and Opti-Spark. Is 1993 a good year? Bought that way, yes: the better-sorted second year of the LT1, with 340 lb-ft and a quieter engine than the 1992’s.

Take the 40th Anniversary car if Ruby Red is the color you want. On 2026’s numbers it costs a few hundred dollars more, and it’s the one paint that proves the year at a glance, as long as the console label agrees. A Z07 coupe, one of 824, is the rare prize. An automatic is the budget path: Hagerty takes 10% off, and most 1993s have one.

Want the passenger airbag and sequential injection? Look at a 1994. Want the vented Opti-Spark and big brakes on every car? A 1995. But a sorted 1993 six-speed is America’s sports car with 300 hp, a period dealer sheet that had it to 60 mph ahead of a Porsche costing twenty grand more, and a 2026 auction median of $14,250. Buy it, sort what the records don’t cover, and drive it.