Pontiac Bonneville Engines by Year

The Bonneville began as a 1957 limited-edition convertible with a fuel-injected 347 and became Pontiac's top full-size car, with the 389, 421 and 455. It was downsized for 1977, became a mid-size car for 1982–1986, and from 1987 a front-drive sedan with the 3800 V6, supercharged in the SSE and SSEi, and the GXP's Northstar V8. Ratings are gross through 1971 and SAE net from 1972.

Pick a year to see every engine offered that model year, with its code, rated horsepower and the trims it came in. Each engine links to its full specs.

Jump to a year

1957–1958: 1957 · 1958

1959–1960: 1959 · 1960

1961–1964: 1961 · 1962 · 1963 · 1964

1965–1970: 1965 · 1966 · 1967 · 1968 · 1969 · 1970

1971–1976: 1971 · 1972 · 1973 · 1974 · 1975 · 1976

1977–1981: 1977 · 1978 · 1979 · 1980 · 1981

Mid-size (1982–1986): 1982 · 1983 · 1984 · 1985 · 1986

1987–1991: 1987 · 1988 · 1989 · 1990 · 1991

1992–1999: 1992 · 1993 · 1994 · 1995 · 1996 · 1997 · 1998 · 1999

2000–2005: 2000 · 2001 · 2002 · 2003 · 2004 · 2005

1957–1958

The 347 and 370.

1957 Bonneville engines

Engine	Rated	Offered in
347 V8	—	Star Chief Custom Bonneville convertible

1958 Bonneville engines

Engine	Rated	Offered in
370 V8	255 hp gross	Bonneville
370 V8	285 hp gross	Bonneville
370 V8	300 hp gross	Bonneville (option)
370 V8	310 hp gross	Bonneville (option)

1959–1960

The 389.

1959 Bonneville engines

Engine	Rated	Offered in
389 V8	215 hp gross	Bonneville (no-cost option)
389 V8	260 hp gross	Bonneville
389 V8	300 hp gross	Bonneville, Bonneville Safari
389 V8	315 hp gross	Bonneville (option)

1960 Bonneville engines

Engine	Rated	Offered in
389 V8	—	Bonneville (no-cost option)
389 V8	235 hp gross	Bonneville
389 V8	281 hp gross	Bonneville
389 V8	303 hp gross	Bonneville, Bonneville Safari
389 V8	318 hp gross	Bonneville (option)
389 V8	333 hp gross	Bonneville (option)
389 V8	348 hp gross	Bonneville (option)

1961–1964

The 389 and 421.

1961 Bonneville engines

Engine	Rated	Offered in
389 V8	230 hp gross	Bonneville (no-cost option)
389 V8	235 hp gross	Bonneville
389 V8	303 hp gross	Bonneville
389 V8	318 hp gross	Bonneville (option)
389 V8	333 hp gross	Bonneville (special order)
389 V8	348 hp gross	Bonneville (special order)

1962 Bonneville engines

Engine	Rated	Offered in
389 V8	230 hp gross	Bonneville (no-cost option)
389 V8	235 hp gross	Bonneville
389 V8	303 hp gross	Bonneville
389 V8	318 hp gross	Bonneville (option)
389 V8	333 hp gross	Bonneville (option)
389 V8	348 hp gross	Bonneville (option)

1963 Bonneville engines

Engine	Rated	Offered in
389 V8	230 hp gross	Bonneville (no-cost option)
389 V8	235 hp gross	Bonneville
389 V8	303 hp gross	Bonneville
389 V8	313 hp gross	Bonneville (option)
421 V8	353 hp gross	Bonneville (option)
421 V8	370 hp gross	Bonneville (option)

1964 Bonneville engines

Engine	Rated	Offered in
389 V8	230 hp gross	Bonneville (no-cost option)
389 V8	303 hp gross	Bonneville
389 V8	306 hp gross	Bonneville
389 V8	330 hp gross	Bonneville (option)
421 V8	320 hp gross	Bonneville (option)
421 V8	350 hp gross	Bonneville (option)
421 V8	370 hp gross	Bonneville (option)

1965–1970

The 389, 400, 421, 428 and 455.

1965 Bonneville engines

Engine	Rated	Offered in
389 V8	256 hp gross	Bonneville (no-cost option)
389 V8	325 hp gross	Bonneville, Bonneville Safari
389 V8	333 hp gross	Bonneville
421 V8	338 hp gross	Bonneville (option)
421 V8	356 hp gross	Bonneville (option)
421 V8	376 hp gross	Bonneville (option)

1966 Bonneville engines

Engine	Rated	Offered in
389 V8	256 hp gross	Bonneville (no-cost option)
389 V8	325 hp gross	Bonneville
389 V8	333 hp gross	Bonneville
421 V8	338 hp gross	Bonneville (option)
421 V8	356 hp gross	Bonneville (option)
421 V8	376 hp gross	Bonneville (option)

1967 Bonneville engines

Engine	Rated	Offered in
400 V8	265 hp gross	Bonneville (no-cost option)
400 V8	290 hp gross	Bonneville (option)
400 V8	325 hp gross	Bonneville
400 V8	333 hp gross	Bonneville
428 V8	360 hp gross	Bonneville (option)
428 V8	376 hp gross	Bonneville (option)

1968 Bonneville engines

Engine	Rated	Offered in
400 V8	265 hp gross	Bonneville (no-cost option)
400 V8	340 hp gross	Bonneville, Bonneville Brougham
428 V8	375 hp gross	Bonneville (option)
428 V8	390 hp gross	Bonneville (option)

1969 Bonneville engines

Engine	Rated	Offered in
400 V8	265 hp gross	Bonneville (no-cost option)
428 V8	360 hp gross	Bonneville
428 V8	390 hp gross	Bonneville (option)

1970 Bonneville engines

Engine	Rated	Offered in
400 V8	265 hp gross	Bonneville (no-cost option)
455 V8	360 hp gross	Bonneville, Bonneville Safari
455 V8	370 hp gross	Bonneville (option)

1971–1976

The 400 and 455.

1971 Bonneville engines

Engine	Rated	Offered in
455 V8 (L66)	280 hp gross	Bonneville
455 V8 (L75)	325 hp gross	Bonneville (option)

1972 Bonneville engines

Engine	Rated	Offered in
455 V8 (L66)	185 hp net	Bonneville
455 V8 (L66)	200 hp net	Bonneville
455 V8 (L75)	250 hp net	Bonneville (option)

1973 Bonneville engines

Engine	Rated	Offered in
400 V8 (L78)	—	Bonneville (option)
400 V8 (L65)	170 hp net	Bonneville
400 V8 (L65)	185 hp net	Bonneville
455 V8	215 hp net	Bonneville (option)
455 V8 (L75)	250 hp net	Bonneville (option)

1974 Bonneville engines

Engine	Rated	Offered in
400 V8 (L65)	175 hp net	Bonneville
400 V8 (L78)	200 hp net	Bonneville (option)
455 V8	215 hp net	Bonneville (option)
455 V8 (L75)	250 hp net	Bonneville (option)

1975 Bonneville engines

Engine	Rated	Offered in
400 V8 (L78)	—	Bonneville (option)
400 V8 (L65)	170 hp net	Bonneville
455 V8	200 hp net	Bonneville (option)

1976 Bonneville engines

Engine	Rated	Offered in
6.6L / 400 V8 (L78)	—	Bonneville (option), Bonneville Brougham
6.6L / 400 V8 (L65)	170 hp net	Bonneville
7.5L / 455 V8	200 hp net	Bonneville (option)

1977–1981

Pontiac, Olds and Buick V8s and V6s, and the diesel.

1977 Bonneville engines

Engine	Rated	Offered in
4.9L / 301 V8 (L27)	135 hp net	Bonneville, Bonneville Brougham
5.7L / 350 V8 (L76 (VIN P)) Pontiac 350; California and high-altitude cars got the Olds 350 (VIN code R).	170 hp net	Bonneville (option)
5.7L / 350 V8 (L34 (VIN R)) Olds 350 in California and high-altitude cars.	170 hp net	Bonneville (option)
6.6L / 400 V8 (L78)	180 hp net	Bonneville (option)
6.6L / 403 V8 (L80)	185 hp net	Bonneville (option)

1978 Bonneville engines

Engine	Rated	Offered in
4.9L / 301 V8 (L27)	—	Bonneville, Bonneville Brougham
5.7L / 350 V8	170 hp net	Bonneville (option)
6.6L / 400 V8 (L78)	180 hp net	Bonneville (option)
6.6L / 403 V8 (L80)	185 hp net	Bonneville (option)

1979 Bonneville engines

Engine	Rated	Offered in
4.9L / 301 V8 (L37)	—	Bonneville (option)
4.9L / 301 V8 (L27)	135 hp net	Bonneville, Bonneville Brougham
5.7L / 350 V8	—	Bonneville (option)
5.7L / 350 V8 (L34)	—	Bonneville (option)

1980 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LD5)	—	Bonneville
4.3L / 265 V8 (LS5)	120 hp net	Bonneville Brougham, Bonneville (option)
4.9L / 301 V8 (L37)	—	Bonneville (option)
5.7L / 350 V8 (L34)	—	Bonneville (California)
5.7L / 350 V8 diesel (LF9)	—	Bonneville Brougham, Bonneville Safari

1981 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LD5)	—	Bonneville, Bonneville Brougham
4.3L / 265 V8 (LS5)	120 hp net	Bonneville (option)
5.0L / 307 V8 (LV2)	—	Bonneville (option)
5.7L / 350 V8 diesel (LF9)	—	Bonneville (option)

Mid-size (1982–1986)

V6s, the 5.0 V8 and the diesel.

1982 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LD5)	—	Bonneville, Brougham, Wagon
4.1L / 252 V6 (LC4)	—	Bonneville (option)
5.7L / 350 V8 diesel (LF9)	—	Bonneville (option)

1983 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LD5)	—	Bonneville
5.0L / 305 V8 (LG4)	—	Bonneville (option)
5.7L / 350 V8 diesel (LF9)	—	Bonneville (option)

1984 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LD5)	—	Bonneville
5.0L / 305 V8 (LG4)	—	Bonneville (option)
5.7L / 350 V8 diesel (LF9)	—	Bonneville (option)

1985 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LD5)	—	Bonneville, Bonneville LE, Brougham
5.0L / 305 V8 (LG4)	—	Bonneville (option)

1986 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LD5)	—	Bonneville
5.0L / 305 V8 (LG4)	—	Bonneville (option)

1987–1991

The 3.8 V6, supercharged from 1992.

1987 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LG3)	150 hp net	Bonneville LE, Bonneville SE

1988 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LN3)	165 hp net	Bonneville LE, Bonneville SE, Bonneville SSE

1989 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LN3)	165 hp net	Bonneville LE, Bonneville SE, Bonneville SSE

1990 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LN3)	165 hp net	Bonneville LE, Bonneville SE, Bonneville SSE

1991 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (LN3)	165 hp net	Bonneville LE, Bonneville SE, Bonneville SSE

1992–1999

The 3800 and supercharged 3800.

1992 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L27)	170 hp net	SE, SSE
3.8L / 231 V6 supercharged (L67)	205 hp net	SSEi

1993 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L27)	170 hp net	SE, SLE, SSE
3.8L / 231 V6 supercharged (L67)	205 hp net	SSEi, SSE (option)

1994 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L27)	170 hp net	SE, SSE
3.8L / 231 V6 supercharged (L67)	225 hp net	SSEi

1995 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SSE
3.8L / 231 V6 supercharged (L67)	225 hp net	SSEi, SLE (option)

1996 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE, SSE
3.8L / 231 V6 supercharged (L67)	240 hp net	SSEi, SLE (option)

1997 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE, SSE
3.8L / 231 V6 supercharged (L67)	240 hp net	SSEi, SLE (option), SSE (option)

1998 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE, SSE
3.8L / 231 V6 supercharged (L67)	240 hp net	SSEi

1999 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE, SSE
3.8L / 231 V6 supercharged (L67)	240 hp net	SSEi

2000–2005

The 3800, supercharged 3800 and the GXP's Northstar V8.

2000 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE
3.8L / 231 V6 supercharged (L67)	240 hp net	SSEi

2001 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE
3.8L / 231 V6 supercharged (L67)	240 hp net	SSEi

2002 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE
3.8L / 231 V6 supercharged (L67)	240 hp net	SSEi

2003 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE
3.8L / 231 V6 supercharged (L67)	240 hp net	SSEi

2004 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE
4.6L / 279 V8 (LD8)	275 hp net	GXP

2005 Bonneville engines

Engine	Rated	Offered in
3.8L / 231 V6 (L36)	205 hp net	SE, SLE
4.6L / 279 V8 (LD8)	275 hp net	GXP

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