1968 - 1982 Corvette Powertrain Combinations

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1963 - 1967 Corvette Tech Center 1984 - 1996 Corvette Tech Center

Below is a complete listing of 1968 - 1982 Corvette Powertrain combinations:

1968 Corvette Powertrain Combinations

Engine Size	H.P. @ RPM	Torque @ RPM	Compression Ratio	Transmission Combination	Axle Ratios**
A	B	C	D
327	300 @ 5000	360 @ 3400	10.0:1	Manual	Base A/C	3.36 3.36	3.08 3.08	-- --	-- --
Auto.	Base A/C	3.08 3.08	-- --	-- --	-- --
327	350 @ 5800	360 @ 3600	11.0:1	4-Spd	Base A/C	3.36 3.36	-- --	3.55 3.55	-- --
4-Spd*	Base A/C	3.70 3.70	-- --	4.11 4.11	-- --
427	390 @ 5400	460 @ 3600	10.25:1	4-Spd	Base A/C	3.08 3.08	-- --	3.36 3.36	-- --
4-Spd*	Base A/C	3.36 3.36	3.08 3.08	3.55 3.55	3.70 3.70
Auto.	Base A/C	3.08 3.08	2.73 2.73	-- --	-- --
427	400 @ 5400	460 @ 3600	10.25:1	4-Spd	Base A/C	3.08 3.08	-- --	3.36 3.36	-- --
4-Spd*	Base A/C	3.36 3.36	3.08 3.08	3.55 3.55	3.70 3.70
Auto.	Base A/C	3.08 3.08	2.73 7.73	-- --	-- --
427	435 @ 5800	460 @ 4000	11.0:1	4-Spd*	3.55	3.36	3.70	4.11
427	430 @ 4600	485 @ 4000	12.5:1	4-Spd*	3.36	3.08	3.55	3.70 4.11 4.56

Engine Size

H.P. @ RPM

Torque @ RPM

Compression Ratio

Transmission Combination

Axle Ratios**

327

300 @ 5000

360 @ 3400

10.0:1

Manual

Base A/C

3.36
3.36

3.08
3.08

--
--

Auto.

Base

A/C

3.08

327

350

5800

360

3600

11.0:1

4-Spd

Base

A/C

3.36

3.55

4-Spd*

Base

A/C

3.70

4.11

427

390

5400

460

3600

10.25:1

4-Spd

Base

A/C

3.08

3.36

4-Spd*

Base

A/C

3.36

3.08

3.55

3.70

Auto.

Base

A/C

3.08

2.73

427

400

5400

460

3600

10.25:1

4-Spd

Base

A/C

3.08

3.36

4-Spd*

Base

A/C

3.36

3.08

3.55

3.70

Auto.

Base

A/C

3.08

2.73

7.73

427

435

5800

460

4000

11.0:1

4-Spd*

3.55

3.36

3.70

4.11

427

430

4600

485

4000

12.5:1

4-Spd*

3.36

3.08

3.55

3.70

4.11

4.56

* Indicates close-ratio-4-Speed **A - Standard; B - Economy; C - Performance; D - Special Purpose

Note: Positraction axles were available optionally for 327 cubic-inch engines with manual transmissions.

All other engine/transmission combinations were available as Positraction only.

1969 Corvette Powertrain Combinations

Engine	Transmission	Rear Axle Ratio (:1)
Without Air Cond.	With Air Cond.
Std.	Optional	Std.	Optional
Econ	Perf	Spcl	Econ	Perf	Spcl
BASE ENGINE
300 HP Turbo-Fire 350 350-Cu.-In. V8	3-Speed (2.54:1 Low)	3.36 *	3.08 **			3.36 *	3.08 **
4-speed (2.52:1 Low)
Turbo Hydra-Matic	3.08 **		3.08 **
OPTIONAL ENGINES
350 HP Turbo-Fire 350 350-Cu.-In. V8 RPO L46	4-speed (2.52:1 Low)	3.36 *		3.55 **		3.36 *		3.55 **
4-Speed (2.20:1 Low)	3.70 *	4.11 **	3.70 *	4.11 **
390 HP Turbo-Jet 427 427-Cu.-In. V8 RPO L36	4-speed (2.52:1 Low)	3.08 **		3.36 **		3.08 **
4-Speed (2.20:1 Low)	3.36 **	3.08 **	3.55 **	3.70 **	Air Conditioning Not Available
Turbo Hydra-Matic	3.08 **	2.73 **			3.08 **	2.73 **
400 HP Turbo-Jet 427 427-Cu.-In. V8 RPO L68	4-speed (2.52:1 Low)	3.08 **		3.36 **		3.08 **
4-Speed (2.20:1 Low)	3.36 **	3.08 **	3.55 **	3.70 **	Air Conditioning Not Available
Turbo Hydra-Matic	3.08 **	2.73 **			3.08 **	2.73 **
435 HP Turbo-Jet 427 427-Cu.-In. V8 RPO L71	4-Speed (2.20:1 Low)	3.55 **	3.36 **	3.70 **	4.11 **	Air Conditioning Not Available
Turbo Hydra-Matic	3.08 **	2.73 **	3.36 **
SPECIAL HIGH PERFORMANCE ENGINE (OFF-ROAD APPLICATION ONLY)
430 HP Turbo-Jet 427 427-Cu.-In. V8 RPO L88	H.D. 4-Speed (2.20:1 Low)	3.36 **	3.08 **	3.55 **	3.70 4.11 4.56 **	Air Conditioning Not Available
Turbo Hydra-Matic	3.08 **	2.73 **	3.36 **

Engine

Transmission

Rear Axle Ratio (:1)

Without Air Cond.

With Air Cond.

Std.

Optional

Std.

Optional

Econ

Perf

Spcl

Econ

Perf

Spcl

BASE ENGINE

300 HP

Turbo-Fire 350

350-Cu.-In. V8

3-Speed

(2.54:1 Low)

3.36

3.08

3.36

3.08

4-speed

(2.52:1 Low)

Turbo

Hydra-Matic

3.08

OPTIONAL ENGINES

350 HP

Turbo-Fire 350

350-Cu.-In. V8

RPO L46

4-speed

(2.52:1 Low)

3.36

3.55

3.36

3.55

4-Speed

(2.20:1 Low)

3.70

4.11

3.70

4.11

390 HP

Turbo-Jet 427

427-Cu.-In. V8

RPO L36

4-speed

(2.52:1 Low)

3.08

3.36

3.08

4-Speed

(2.20:1 Low)

3.36

3.08

3.55

3.70

Air Conditioning

Not Available

Turbo

Hydra-Matic

3.08

2.73

3.08

2.73

400 HP

Turbo-Jet 427

427-Cu.-In. V8

RPO L68

4-speed

(2.52:1 Low)

3.08

3.36

3.08

4-Speed

(2.20:1 Low)

3.36

3.08

3.55

3.70

Air Conditioning

Not Available

Turbo

Hydra-Matic

3.08

2.73

3.08

2.73

435 HP

Turbo-Jet 427

427-Cu.-In. V8

RPO L71

4-Speed

(2.20:1 Low)

3.55

3.36

3.70

4.11

Air Conditioning

Not Available

Turbo

Hydra-Matic

3.08

2.73

3.36

SPECIAL HIGH PERFORMANCE ENGINE (OFF-ROAD APPLICATION ONLY)

430 HP

Turbo-Jet 427

427-Cu.-In. V8

RPO L88

H.D. 4-Speed

(2.20:1 Low)

3.36

3.08

3.55

3.70

4.11

4.56

Air Conditioning

Not Available

Turbo

Hydra-Matic

3.08

2.73

3.36

*Positraction available. **Positraction required.

1970 Corvette Powertrain Combinations

Engine	Transmission	Ratio Without Air Conditioning			Ratio With Air Conditioning
		Std.	Optional		Std.	Optional
		Std.	Econ.	Perf.	Std.	Econ.	Perf.
BASE ENGINE
300 HP 350-Cu.-In. V8 Turbo-Fire 350	Turbo Hydra-matic	3.08	-	3.36	3.08	-	3.36
300 HP 350-Cu.-In. V8 Turbo-Fire 350	4-Speed (2.52:1 low)	3.36	3.08	-	3.36	3.08	-
OPTIONAL ENGINES
350 HP (RPO L46) 350-Cu.-In. V8 Turbo-Fire 350	4-Speed (2.20:1 low)	3.70	-	4.11	Air Conditioning Not Available
350 HP (RPO L46) 350-Cu.-In. V8 Turbo-Fire 350	4-speed (2.52:1 low)	3.36	-	-	3.36	-	3.55
370 HP (RPO LT1) 350-Cu.-In. V8 Turbo-Fire 350	4-Speed (2.20:1 low)	3.70	3.55	4.11	Air Conditioning Not Available
370 HP (RPO LT1) 350-Cu.-In. V8 Turbo-Fire 350	4-speed (2.52:1 low)	3.55	3.36	3.70	Air Conditioning Not Available
390 HP (RPO LS5) 454-Cu.-In. V8 Turbo-Jet 454	Turbo Hydra-matic	3.08	2.73	-	3.08	-	-
	4-Speed (2.20:1 low)	3.36	3.08	3.55*	Air Conditioning Not Available
	4-speed (2.52:1 low)	3.08	-	3.36	3.08	-	-
460 HP (RPO LS7) 454-Cu.-In. V8 Turbo-Jet 454	Turbo Hydra-matic	3.08	-	3.36	Air Conditioning Not Available
460 HP (RPO LS7) 454-Cu.-In. V8 Turbo-Jet 454	4-Speed (2.20:1 low)	3.36	3.08	3.55	Air Conditioning Not Available

*Special 3.70 ratio also available.

Note: The LS7 engine was not produced for retail sale.

1971 Corvette Powertrain Combinations

Engine	Transmission	Ratio Without Air Conditioning			Ratio With Air Conditioning
		Std.	Optional		Std.	Optional
		Std.	Econ.	Perf.	Std.	Econ.	Perf.
Base engine
270-hp (210-hp†) 350-Cu.-In. Turbo-Fire 350 V8	Turbo Hydra-matic	3.08	-	3.36	3.08	-	3.36
270-hp (210-hp†) 350-Cu.-In. Turbo-Fire 350 V8	4-Speed (2.52:1 low)	3.36	3.08	-	3.36	3.08	-
Available engines
330-hp (275-hp†) 350-Cu.-In. (RPO LT1) Turbo-Fire 350 V8	4-Speed (2.20:1 low)	3.70	3.55	4.11	Air Conditioning Not Available
330-hp (275-hp†) 350-Cu.-In. (RPO LT1) Turbo-Fire 350 V8	4-speed (2.52:1 low)	3.55	3.36	3.70	Air Conditioning Not Available
365-hp (285-hp†) 454-Cu.-In. (RPO LS5) Turbo-Jet 454 V8	Turbo Hydra-matic	3.08	-	3.36	3.08	-	-
	4-Speed (2.20:1 low)	3.36	3.08	3.55*	Air Conditioning Not Available
	4-speed (2.52:1 low)	3.08	-	3.36	3.08	-	-
425-hp (325-hp†) 454-Cu.-In. (RPO LS6) Turbo-Jet 454 V8	Turbo Hydra-matic	3.08	-	3.36	Air Conditioning Not Available
	4-Speed (2.20:1 low)	3.36	3.08	3.55
	Special 4-Speed (2.20:1 low)	3.36	3.08	3.55**

†SAE net (as installed) horsepower rating. *Special 3.70 ratio also available. **Special 3.70 or 4.11 ratio also available.

1972 Corvette Powertrain Combinations

ENGINES	TRANSMISSIONS	POSITRACTION AXLE RATIOS
ENGINES	TRANSMISSIONS	Std.	Economy	Perf.	Special
Standard: 200-hp † Turbo-Fire 350 V8	Std: 4-Speed (2.52:1 low)	3.36	3.08	-	-
Standard: 200-hp † Turbo-Fire 350 V8	Turbo Hydra-matic	3.08	-	3.36	-
AVAILABLE ENGINES
255-hp † Turbo-Fire 350 V8 (RPO LT1)	4-Speed (2.52:1 low)	3.55	3.36	3.70	-
	4-Speed (2.20:1 low)	3.70	3.55	4.11	-
	Special 4-Speed (2.20:1 low)	3.36	3.08	3.55	3.70, 4.11
270-hp† Turbo-Jet 454 V8 (RPO LS5*)	4-Speed (2.52:1 low)	3.08	-	3.36	-
	4-Speed (2.20:1 low)	3.36	3.08	3.55	3.70
	Turbo Hydra-matic	3.08	-	3.36**	-

†Net horsepower ratings, in accordance with Society of Automotive Engineers Standards, represent the power output of engines as installed in the automobile.

*Not available in California.

**Not available with air conditioning.

1973 Corvette Powertrain Combinations

Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	Positraction Axle Ratios(:1)
Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	"A"	"C"
350 L48	8.5:1	190	270	4-Speed Manual WR	3.36	3.08	-
350 L48	8.5:1	190	270	Turbo Hydra-Matic*	3.08	-	3.36
350 L82*	9.0:1	250	285	4-Speed Manual WR	3.55	3.36	3.70#
				4-Speed Manual CR*	3.70	3.55a	-
				Turbo Hydra-Matic*	3.55	3.36	3.70
454 LS4*	8.25:1	275	395	4-Speed Manual WR	3.08	-	3.36
				4-Speed Manual CR*	3.36b	-	3.55b
				Turbo Hydra-Matic*	3.08	-	3.36

*Optional

A - Standard Axle

B - Economy Axle (optional)

C - Performance Axle (optional)

# - 3.55 with Air Conditioning

WR - Wide Ratio (2.52:1 low)

CR - Close Ratio (2.20:1 low)

Air Conditioning not available with 3.70:1 axle ratio or Z07 Off-Road Suspension Package.

a - 3.70 standard with RPO Z07 Off-Road Package; 4.11, 3.55 & 3.36 optional

b - With RPO Z07, 3.55 standard; 3.08 & 3.36 optional

1974 Corvette Powertrain Combinations

Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	Positraction Axle Ratios(:1)
Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	"A"	"B"	"C"
350 L48	8.5:1	195	275	4-Speed Manual WR	3.36#	3.08#	-
350 L48	8.5:1	195	275	Turbo Hydra-Matic*	3.08#	-	3.36#
350 L82*	9.0:1	250	285	4-Speed Manual WR	3.55#	-	3.70
				4-Speed Manual CR*	3.70	3.55#a	-
				Turbo Hydra-Matic*	3.55#	-	3.70
454 LS4*	8.25:1	270	380	4-Speed Manual WR	3.08#	-	3.36
				4-Speed Manual CR*	3.36#b	3.08#	3.55b
				Turbo Hydra-Matic*	3.08#	-	3.36

*Optional

A - Standard Axle

B - Economy Axle (optional)

C - Performance Axle (optional)

WR - Wide Ratio (2.52:1 low Muncie - 2.64:1 low Warner)

CR - Close Ratio (2.20:1 low Muncie - 2.43:1 low Warner)

# - Air Conditioning available

Air Conditioning not available with Z07 Off-Road Package.

a - 3.70 standard with RPO Z07 Off-Road Package; 4.11, 3.55 & 3.36 optional

b - With RPO Z07, 3.55 standard; 3.08 & 3.36 optional

1975 Corvette Powertrain Combinations

Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	Positraction Axle Ratios(:1)
Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	"A"	"B"	"C"
350 L48	8.5:1	165	255	4-Speed Manual WR	3.36	3.08	-
350 L48	8.5:1	165	255	Turbo Hydra-Matic 400*	3.08	2.73	-
350 L82*	9.0:1	205	255	4-Speed Manual WR	3.55	-	-
				4-Speed Manual CR*	3.55	-	3.70
				Turbo Hydra-Matic 400*	3.36	-	3.55

*Optional

A - Standard Axle

B - Highway Axle (optional)

C - High-Altitude/Performance Axle (optional)

WR - Wide Ratio ( 2.64:1 low )

CR - Close Ratio ( 2.43:1 low )

Air Conditioning available with all axle ratios except 3.70.

1976 Corvette Powertrain Combinations

Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	Positraction Axle Ratios(:1)
Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	"A"	"B"	"C"
350 L48	8.5:1	180	270	4-Speed Manual WR#	3.36	3.08	-
350 L48	8.5:1	180	270	Turbo Hydra-Matic 350*	3.08	-	-
350 L82*#	9.0:1	210	255	4-Speed Manual WR	3.55	-	-
				4-Speed Manual CR*	3.55	-	3.70
				Turbo Hydra-Matic 400*	3.36	-	3.55

*Optional

# - Not available in California

A - Standard Axle

B - Highway Axle (optional)

C - High-Altitude/Performance Axle (optional)

WR - Wide Ratio ( 2.64:1 low )

CR - Close Ratio ( 2.43:1 low )

Air Conditioning available with all axle ratios except 3.70.

1977 Corvette Powertrain Combinations

Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	Positraction Axle Ratios(:1)
Engine Type	Compr. Ratio	Net H.P.	Net Torque	Transmission	"A"	"B"	"C"
350 L48	8.5:1	180	270	4-Speed Man. WR#**	3.36	3.08	-
350 L48	8.5:1	180	270	Turbo Hydra-Matic 350*	3.08	-	3.08
350 L82*#	9.0:1	210	255	4-Speed Man. WR**	3.70	3.55	-
				4-Speed Man. CR/*	3.70	3.55	3.55
				Turbo Hydra-Matic 400*	3.55	-	-

*Optional

** With High-Altitude Emission equipment

# - Not available in California

A - Standard Axle

B - Optional Axle

C - Axle with High-Altitude Emission Equipment (optional)

"A" & "B" - Below 4000 feet altitude in 49 states and all altitudes in California

"C" - Above 4000 feet altitude in all states except California

WR - Wide Ratio ( 2.64:1 low )

CR - Close Ratio ( 2.43:1 low )

Air Conditioning available with all axle ratios except 3.70.

1978 Corvette Powertrain Combinations

Engine Type	Net H.P.	4-Speed Man. 2.85:1 low	4-Speed Man. 2.64:1 low	4-Speed Man. 2.43:1 low	Turbo Hydra-Matic 350
Engine Type	Net H.P.	4-Speed Man. 2.85:1 low	4-Speed Man. 2.64:1 low	4-Speed Man. 2.43:1 low	Below 4K ft.	Abv. 4K
350 L48 Fed	185/175*	3.36:1	N/A	N/A	3.08:1	3.55:1
350 L48 Calif	175	N/A	N/A	N/A	3.55:1	N/A
350 L82**	220	N/A	3.70:1 3.36:1#	3.70:1	3.55:1	N/A

* 175 horsepower rating with High-Altitude Emission Equipment

** Optional L82 engine not available in California; Maryland; Florida; Oregon; Washington; Boston; Chicago; Des Plaines, IL; Barrington, IL; Grand Rapids, MI; and Cook County, IL.

# - 3.70 axle is standard; 3.36 is available highway ratio

N/A - Not Available

Note: California Emission Equipment required for registration in California. In other states, High-Altitude Emission Equipment may be required in areas 4,000 feet or more above sea level.

Air conditioning available with all axle ratios except 3.70.

1979 Corvette Powertrain Combinations

Engine Type	Net H.P.	4-Speed Man. 2.85:1 low	4-Speed Man. 2.64:1 low	4-Speed Man. 2.43:1 low	Turbo Hydra-Matic 350 Transmission
350 L48 Fed	195	3.36:1	N/A	N/A	3.55:1
350 L48 H/A	195	N/A	N/A	N/A	3.55:1
350 L48 Calif.	195	N/A	N/A	N/A	3.55:1
350 L82*	225	N/A	3.70:1 3.36:1#	3.70:1	3.55:1

* Optional L82 engine not available in California

# - 3.70 axle is standard; 3.36 is available Highway ratio

N/A - Not Available

H/A - High-Altitude Emission

Note: California Emission Equipment required for registration in California. In other states, High-Altitude Emission Equipment may be required in areas 4,000 feet or more above sea level.

1980 Corvette Powertrain Combinations

Engine Type	Net H.P.	4-Speed Manual 2.88:1 low	Turbo Hydra-Matic 350 Transmission
350 L48	190	3.07:1	3.07:1
305 LG4 Calif.	180	N/A	3.07:1
350 L82*	230	N/A	3.07:1

* Optional L82 engine

N/A - Not Available

1981 Corvette Powertrain Combinations

Engine Type

Net H.P.

4-Speed Manual

2.88:1 low

Turbo Hydra-Matic

350 Transmission

350 L81

190

2.72:1

2.87:1

1982 Corvette Powertrain Combinations

Engine Type

Net H.P.

Turbo Hydra-Matic

700-R4 Transmission

350 L83

200

2.72:1 Standard

2.87:1 Collector Edition