1991 CORVETTE

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Not a year of great change after the launch of the ZR-1 the previous year.

V.I.N. NUMBERS

Position Character Description
1 1 US built
2 G General Motors product
3 1 Chevrolet Motor Division vehicle
4 & 5 YY Basic Corvette
YZ Corvette ZR-1
6 2 or 3 Body style number
  • 2 = Two door hatchback style 07, 08, 77, or 87
  • 3 = Two door convertible style 67
7 1 or 2 1=Manual seat belts
3=Manual belts with driver-inflatable restraint system
4=Automatic belts
8 8 L98 5.7-liter Tuned-Port-Injection Chevrolet or GM of Canada V8
J LT5 - 5.7-liter TPI V-8
9 ? A check digit that calculates the characters in the serial number and gives it a single digit code and can be used to verify that the serial number is legitimate
10 M The model year where 1991
11 5 Bowling Green, KY
12-17 100001 and up production sequence for coupes and convertibles
800001 and up production sequence for ZR-1s
Code Engine Horsepower Compression Transmission Fuel Supply Extra features
ZTA L98 350-cid 245/250-hp V-8 10.0:1 automatic tuned port injection  
ZTB L98 350-cid 245/250-hp V-8 10.0:1 manual tuned port injection Engine oil cooler
ZTC L98 350-cid 245/250-hp V-8 10.0:1 automatic tuned port injection Engine oil cooler
ZTK LT5 350-cid 375-hp V-8 11.0:1 manual tuned port injection  
Color Cloth Upholstery Leather Upholstery
Black 19C 193
Saddle 60C 603
Blue   223
Red   733
Gray   903

IDENTIFICATION

Model Model No. Body/Style No. Body Type Factory Price Shipping Weight Production Total
Coupe 1YY Y07
2-dr. Hatch Coupe - 2 passenger

2-dr. Hatch Coupe - 2 passenger

$32,455 3223 14,967
Convertible 1YY Y67
2-dr. Convertible - 2 passenger

2-dr. Convertible - 2 passenger

$38,770 3263 5,672
ZR-1 1YZ Z07
2-dr. Hatch Coupe - 2 passenger

2-dr. Hatch Coupe - 2 passenger

$64,138 3465 2,044

ENGINE

Feature Standard Engine (RPO L98) ZR-1 Engine (RPO LT5)
Type V-8, 90-degree Overhead valve V-8, 90-degree Overhead valve with 4 valves per cylinder and 4 overhead camshafts
Block Cast iron block and aluminum cylinder head Cast iron block and cylinder head
Displacement 350 cid (5.7 liters) 350 cid (5.7 liters)
Bore & Stroke 4.00" x 3.48" 4.00" x 3.48"
Compression ratio 10.0:1 11.0:1
Brake horsepower 245 @ 4000 (250-hp for hatchbacks using 3.07:1 rear axle due to use of low-restriction mufflers with this option combination only) 375 @ 5800 rpm
Torque 340 lb-ft @ 3200 370 lb-ft @ 5600
Main bearing five five
Valve lifters hydraulic hydraulic
Fuel supply Tuned-port induction (TPI) system Tuned-port induction (TPI) system

TRANSMISSION

CHASSIS

Feature Coupe Convertible ZR-1
Wheelbase 96.2 inches (2.443 m) 96.2 inches (2.443 m) 96.2 inches (2.443 m)
Overall length 176.5 inches (4.483 m) 176.5 inches (4.483 m) 177.4 inches (4.506 m)
Overall width 71.0 inches (1.803 m) 71.0 inches (1.803 m) 74.0 inches (1.880 m)
Overall height 46.7 inches (1.186 m)   46.7 inches (1.186 m)
Front tread 59.6 inches (1.514 m) 59.6 inches (1.514 m) 59.6 inches (1.514m)
Rear tread 60.4 inches (1.534 m) 60.4 inches (1.534 m) 61.9 inches (1.572m)
Front Tires P275/40ZR-17 Goodyear Eagle GT P275/40ZR-17 Goodyear Eagle GT P275/40ZR-17 Goodyear Eagle GT
Rear Tires P275/40ZR-17 Goodyear Eagle GT P275/40ZR-17 Goodyear Eagle GT P315/35ZR-17 Goodyear Eagle GT
Steeringrack and pinion (power assisted)
Front suspensionSingle fiberglass composite monoleaf transverse spring with unequal-length aluminum control arms and stabilizer bar
Rear suspensionFully independent five-link system with transverse fiberglass single-leaf springs, aluminum upper/lower trailing links and strut-rod tie-rod assembly
BrakesFour-wheel power disc
Body constructionUnibody with partial front frame
Fuel tank20 US Gal (16.7 Imp Gal) (76 liters)

OPTIONS

RPO AC1 Power passenger seat $290
RPO AC3 Power driver seat $290
RPO A09 Leather sports seats $1050
RPO AR9 Base leather seats $425
RPO B2K Callaway Twin Turbo installed by Callaway Engineering $33,000
RPO CC2 Auxiliary hardtop for convertible $1995
RPO C2L Dual removable roof panels for coupe $915
RPO 24S Removable roof panels with blue tint for coupe $615
RPO 64S Removable roof panels with bronze tint for coupe $615
RPO C68 Electronic air conditioning control $180
RPO FX3 Electronic Selective Ride & Handling system $1,695
RPO G92 Performance axle ratio 3.07:1 $22
RPO KC4 Engine oil cooler $110
RPO MN6 Six-speed manual transmission no-cost option
RPO NNS California emissions requirements $100
RPO UJ6 Low tire pressure warning indicator $325
RPO UU8 Delco-Bose stereo system $823
RPO UlF Delco-Bose stereo system with compact disc changer $1,219
RPO V56 Luggage rack for convertible $140
RPO Z07 Adjustable handling package (733 were built) $2,500
RPO ZR1 Special performance package for coupe $31,683

HISTORICAL NOTES

1991 Corvette Notes

PHOTOS

1991 Corvette

1991 Corvette

1991 Corvette

1991 Corvette

1991 Corvette

1991 Corvette

1991 Corvette

1991 Corvette

LITERATURE & LINKS