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1991 Specs

More About the 1991 Corvette
1991 Chevrolet Corvette Convertible in White

1991 Chevrolet Corvette Convertible in White

Close1991 Chevrolet Corvette Convertible in White

Body Specs

Wheelbase: 96.2 inches
Overhang (Front): 40.5 inches
Overhang (Rear): 39.7 inches
Front Track: 59.6 inches
Rear Track: 60.4 inches
ZR-1: 61.9 inches
Length: 176.6 inches
ZR-1: 177.4 inches
Width: 71.0 inches
ZR-1: 73.291 inches
Ground Clearance
Differential to Ground: 		6.8 inches
Ground Clearance
Front Bumper to Ground: 		4.9 inches
Ground Clearance
Rear Bumper to Ground: 		13.0 inches
Minimum Ground Clearance: 4.7 inches
(Measured at Catalytic Converter)
Overall Height: 46.7 inches (Coupe)
46.4 inches (Convertible)
46.7 inches (Zr-1)
Rocker Panel to Ground (Front): 6.9 inches
Rocker Panel to Ground (Rear): 6.9 inches
Cargo Capacity: 100 lbs. / (Coupe and Convertible)
6.6 cubic feet (Convertible)
12.6 cubic feet (Coupe)
Liftover Height: 35.5 Inches (Coupe)
Cowl Height: 33.4 inches
Effective Head Room: 36.4 inches
Shoulder Room: 54.1 inches
Hip Room: 49.3 inches
Tire Size: P275/40ZR17 B/W
(Goodyear Eagle 40ZR, Unidirectional)
ZR-1 (Rear)
P315/35ZR17
Wheel Size: 17" x 9.5" (Front and Rear)
ZR-1 Rear: 17" x 11.0"
Recommended Tire Inflation 35 PSI Front / Rear
Manual Six Speed Transmission: 1st Gear 2.68:1
2nd Gear 1.80:1
3rd Gear 1.31:1
4th Gear 1.00:1
5th Gear .75:1
6th Gear .50:1
Reverse Gear 2.50:1
Turbo Hydra-Matic (Automatic) Transmission: 1st Gear 3.06:1
2nd Gear 1.63:1
3rd Gear 1.00:1
4th Gear 0.70:1
Reverse Gear 2.29:1
Turbo Hydra-Matic (Automatic)
Transmission Lubricant: 		Dextron II
8.0 Pints
Maximum Uphill Speed
(Wide Open Throttle): 		1 > 2: 43 MPH
2 > 3: 79 MPH
3 > 4: 116 MPH
Manual Transmission
Lubricant Type: 		5W-30 Texaco Code 1650 TL11408A, GM 9985535
2.1 Liters
Axle Ratio: 3.07:1, 3.33:1, 2.73:1 (Manual Transmission)
2.59:1, 3.07:1 (Automatic Transmission)
Standard Fuel Tank Capacity: 20 Gallons
Steering Ratio: 15.7:1
Turning Diameters
Outside Front: 		41.3 feet (Wall to Wall)
40.0 feet (Curb to Curb)
Steering Wheel Diameter: 15.0 inches

EPA Fuel Economy

Twin Turbo Manual: City: 13
Highway: 20
Combined: 15
Manual: City: 15
Highway: 23
Combined: 17
Automatic: City: 15
Highway: 22
Combined: 17
Manual: City: 15
Highway: 24
Combined: 18

Weight

Model 1YY07 2-Door Hatchback Coupe : Curb Mass
Front: 1,693 lb.
Rear: 1,601 lb.
Total: 3,294 lb.
Shipping**: 3,188 lb.
ETWC*: 3,625 lb.
Model 1YY67 2-Door Convertible: Curb Mass
Front: 1,717 lb.
Rear: 1,616 lb.
Total: 3,333 lb.
Shipping**: 3,230 lb.
ETWC*: 3,750 lb.
Model 1YZ07 2-Door Hatchback Coupe (ZR1): Curb Mass
Front: 1,812 lb.
Rear: 1,658 lb.
Total: 3,470 lb.
Shipping**: 3,366` lb.
ETWC*: 3,750 lb.
* Equivalent Test Weight Class - basis for US Environmental Protection Agency emission certifications.
** Shipping weight = Curb Weight Less 106 lbs.
Weight Differentials
Removeble Plastic Roof Panel
(RPO CC3): 		-3.1 lb.
(-0.9 lb. Front; -2.2 lb. Rear)
Electric Defogger System
Rear Window and Side Mirror
(RPO Z6A): 		+0.8 lb.
(+0.4 lb. Front; +0.4 lb. Rear)
Delco-Bose
Premium Audio System
(RPO UU8): 		+9.7 lb.
(+3.3 lb. Front; +6.4 lb. Rear)
Custom Adjustable Seats
(RPO AQ9): 		+13.5 lb.
(+6.2 lb. Front; +7.3 lb. Rear)
Automatic Air Conditioning
(RPO C68): 		+2.2 lb.
Leather Seat Trim
(RPO AR9): 		+3.5 lb.
(+1.3 lb. Front; +2.2 lb. Rear)
Adjustable Suspension Package
(RPO Z07): 		+9.5 lb.
(+4.2 lb. Front; +5.3 lb. Rear)

Engine Specs

Type:: 90° V8 (LT5: DOHC 32-Valve)
Bore / Stroke:: 4.00" / 3.48"
LT-5: 3.90" x 3.66"
Engine Weight:: ZR-1 LT5 596 lb.
Standard L98: 557 lb.
Fuel Requirement:: 91-Octane Rating Unleaded Gasoline
(L98, ZR-1 Engines)
Compression Ratio:: L98: 10.0:1
LT5 (ZR-1): 11.0:1
Cylinder Head Material:: Aluminum
Cylinder Block Material:: L98: Cast Alloy Iron
LT5 (ZR-1): Aluminum
Oil Pump Type:: Gear
Cooling System Capacity: 14.65 Quarts (Manual Transmission)
14.51 Quarts (Automatic Transmission)
16.7 Quarts (ZR-1)
Battery: 12 volt - 630 Cold Cranking Amps (CCA)
54 Amp-hours
Alternator: Delco-Remy
105 Amps
Fuel System
Type: Electronic Fuel Injection - Tuned Port Injection (TPI)
(L98 and LT5 Engines)
Fuel Pump: Electric, Dual Turbine - In Fuel Tank
Point of Injection: Fuel Injectors at Inlet Ports
Flow: Pulse
Horsepower
ZR-1 Engine LT5 (350 cubic inch): 375 hp @ 5,800 RPM;
Torque: 370 lb-ft @ 4,800 RPM
Axle Ratio: 3.45:1
Standard Engine L98 (350 cubic inch): Manual Transmission: 250 hp @ 4,400 RPM;
Torque: 350 lb-ft @ 3,200 RPM
Axle Ratio: 3.45:1
Automatic Transmission: 245 hp @ 4,000 RPM;
Torque: 345 lb-ft @ 3,200 RPM
Axle Ratio: 2.59:1
Automatic Transmission: 250 hp @ 4,400 RPM;
Torque: 350 lb-ft @ 3,200 RPM
Axle Ratio: 3.07:1
Automatic Transmission: 245 hp @ 4,000 RPM;
Torque: 345 lb-ft @ 3,200 RPM
Axle Ratio: 2.73:1
Ignition System
Spark Plug
(Standard L98 Engine): 		FR5LS
Make: AC
Spark Plug
(ZR-1 LT5 Engine): 		FR2LS
Make: AC
Spark Plug Thread: M14 x 1.25
Spark Plug Gap: .035 inch
Spark Plug Tightening Torque: 18 - 22 lb. - ft.
Brakes
Type: Hydraulic Power Brake Front and Rear Disc
Effective Area: 32.4 Square Inches (209 Square cm.) (Front)
18.4 Square Inches (119 Square cm.) (Rear)
Gross Lining Area: 33.0 Square Inches (213 Square cm.) (Front)
18.4 Square Inches (119 Square cm.) (Rear)
Swept Area: 111.9 Square Inches (722 Square cm.) (Front)
91.3 Square Inches (589 Square cm.) (Rear)
Rotor: Outer Working Diameter: (302 mm.) 9.9 inches
Inner Working Diameter:
7.3 Inches (222 mm.) (Front),
7.6 Inches (232 mm.) (Rear)
Type and Material: Vented, Gray Iron Vented (Front)
HCE Iron Vented (Rear)

1991 Corvette Options

RPO: Description Production:    Price
24S Removable Roof Panel, blue tint (coupe) 6,991 (33.87%) $615.00
64S Removable Roof Panel, bronze tint (coupe) 3,036 (14.71%) $615.00
AC1 Power Passenger Seat 17,267 (83.66%) $290.00
AC3 Power Driver Seat 19,937 (96.60%) $290.00
AQ9 Sports Seats, leather 10,650 (51.60%) $1,050.00
AR9 Base Seats, leather 9,505 (46.05%) $425.00
B2K Callaway Twin Turbo (not GM installed) 71 (0.34%) $33,000.00
C2L Dual Removable Roof Panels (coupe) 5,031 (24.38%) $915.00
C68 Electronic Air Conditioning Control 19,233 (93.19%) $180.00
CC2 Auxiliary Hardtop (convertible) 1,230 (5.96%) $1,995.00
FX3 Selective Ride and Handling, electronic 6,894 (33.40%) $1,695.00
G92 Performance Axle Ratio 3,453 (16.73%) $22.00
KC4 Engine Oil Cooler 7,525 (36.46%) $110.00
MN6 6-Speed Manual Transmission 5,875 (28.47%) n/a
NN5 California Emission Requirements 3,050 (14.78%) $100.00
U1F Stereo System with CD, Delco-Bose 15,345 (74.35%) $1,219.00
UJ6 Low Tire Pressure Warning Indicator 5,175 (25.07%) $325.00
UU8 Stereo System, Delco-Bose 3,786 (18.34%) $823.00
V56 Luggage Rack (convertible) 886 (4.29%) $140.00
Z07 Adjustable Suspension Package (coupe) 733 (3.55%) $2,155.00
ZR1 Special Performance Package (coupe) 2,044 (9.90%) $31,683.00

Total Production: 20,639
Coupe: 14,967 (72.52%)
Convertible: 5,672 (27.48%)

Notes: Base Corvette Coupe with 350 cu. in. 245 hp engine and four speed automatic transmission: $32,455.00.
Base Corvette Convertible with 350 cu. in. 240 hp engine and four speed automatic transmission: $38,770.00.

Colors

Code Exterior Quantity Interior Soft Top
10 White 4,305 (20.86%) Blue / Black / Gray / Red / Saddle Black / Beige / White
25 Steel Blue Metallic 835 (4.05%) Blue / Black Blue / Black / White
35 Yellow 650 (3.15%) Black / Gray / Saddle Black / Beige / White
41 Black 3,909 (18.94%) Blue / Black / Gray / Saddle Black / Beige / White
42 Turquoise Metallic 1,621 (7.85%) Black / Saddle Blue / Black
75 Dark Red Metallic 1,311 (6.35%) Black / Saddle Black / Beige / White
80 Quasar Blue Metallic 1,038 (5.03%) Black / Saddle Black / Beige
81 Bright Red 5,318 (25.77%) Black / Gray / Red / Sadddle Black / Beige / White
91 Polo Green Metallic 1,230 (5.96%) Black / Saddle Black / Beige
96 Charcoal Metallic 417 (2.02%) Black / Gray / Saddle Black / White

1991 Corvette