Pontiac Grand Am Engines by Year

The first Grand Am was a big-engine intermediate. The name returned on the N-body front-drive car for 1985, with Iron Duke, Quad 4 and V6 engines, and was Pontiac's best seller. 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

gen1 A-body (1973–1975): 1973 · 1974 · 1975

gen2 A-body (1978–1980): 1978 · 1979 · 1980

gen3 N-body (1985–1991): 1985 · 1986 · 1987 · 1988 · 1989 · 1990 · 1991

gen4 N-body (1992–1998): 1992 · 1993 · 1994 · 1995 · 1996 · 1997 · 1998

gen5 N-body (1999–2005): 1999 · 2000 · 2001 · 2002 · 2003 · 2004 · 2005

gen1 A-body (1973–1975)

1973 Grand Am engines

Engine	Rated	Offered in
400 V8 (L78)	—	Grand Am coupe, Grand Am sedan
400 V8 (L65)	170 hp net	Grand Am coupe, Grand Am sedan
400 V8 (L78)	230 hp net	Grand Am coupe, Grand Am sedan
455 V8 (L75)	250 hp net	Grand Am coupe, Grand Am sedan

1974 Grand Am engines

Engine	Rated	Offered in
400 V8 (L65)	175 hp net	Grand Am coupe, Grand Am sedan
400 V8 (L65)	190 hp net	Grand Am coupe, Grand Am sedan
400 V8 (L78)	225 hp net	Grand Am coupe, Grand Am sedan
455 V8 (L75)	250 hp net	Grand Am coupe, Grand Am sedan

1975 Grand Am engines

Engine	Rated	Offered in
400 V8 (L65)	170 hp net	Grand Am coupe, Grand Am sedan
400 V8 (L78)	185 hp net	Grand Am coupe, Grand Am sedan
455 V8 (L75)	200 hp net	Grand Am coupe, Grand Am sedan

gen2 A-body (1978–1980)

1978 Grand Am engines

Engine	Rated	Offered in
4.9L / 301 V8 (L78)	—	Grand Am coupe, Grand Am sedan
4.9L / 301 V8 (L27)	140 hp net	Grand Am coupe, Grand Am sedan
5.0L / 305 V8 (LG3)	135 hp net	Grand Am coupe, Grand Am sedan

1979 Grand Am engines

Engine	Rated	Offered in
3.8L / 231 V6 (LD5)	115 hp net	Grand Am coupe, Grand Am sedan
4.9L / 301 V8 (L27)	135 hp net	Grand Am coupe, Grand Am sedan
4.9L / 301 V8 (L37)	150 hp net	Grand Am coupe, Grand Am sedan
5.0L / 305 V8 (LG4)	—	Grand Am coupe, Grand Am sedan

1980 Grand Am engines

Engine	Rated	Offered in
4.9L / 301 V8 (L37/W72)	—	Grand Am coupe, Grand Am sedan
5.0L / 305 V8 (LG4)	—	Grand Am coupe, Grand Am sedan

gen3 N-body (1985–1991)

1985 Grand Am engines

Engine	Rated	Offered in
2.5L / 151 inline-four (LR8)	—	Grand Am, Grand Am LE, Grand Am SE
3.0L / 181 V6 (LN7)	125 hp net	Grand Am, Grand Am LE, Grand Am SE

1986 Grand Am engines

Engine	Rated	Offered in
2.5L / 151 inline-four (LR8)	—	Grand Am, Grand Am LE, Grand Am SE
3.0L / 181 V6 (LN7)	125 hp net	Grand Am, Grand Am LE, Grand Am SE

1987 Grand Am engines

Engine	Rated	Offered in
2.0L / 121 inline-four turbo (LT3)	165 hp net	Grand Am SE (standard), Others (optional)
2.5L / 151 inline-four (LR8)	98 hp net	Grand Am, Grand Am LE, Grand Am SE
3.0L / 181 V6 (LN7)	125 hp net	Grand Am, Grand Am LE, Grand Am SE

1988 Grand Am engines

Engine	Rated	Offered in
2.0L / 121 inline-four turbo (LT3)	165 hp net	Grand Am SE (standard), LE (optional)
2.3L / 138 inline-four (LD2)	150 hp net	Grand Am, Grand Am LE, Grand Am SE
2.5L / 151 inline-four (LR8)	98 hp net	Grand Am, Grand Am LE, Grand Am SE

1989 Grand Am engines

Engine	Rated	Offered in
2.0L / 121 inline-four turbo (LT3)	165 hp net	Grand Am SE (early 1989), LE (optional)
2.3L / 138 inline-four (LD2)	150 hp net	Grand Am, Grand Am LE, Grand Am SE
2.5L / 151 inline-four (LR8)	110 hp net	Grand Am, Grand Am LE, Grand Am SE

1990 Grand Am engines

Engine	Rated	Offered in
2.3L / 138 inline-four (LD2)	160 hp net	Grand Am LE (optional), SE with automatic
2.3L / 138 inline-four (LG0)	180 hp net	Grand Am SE (5-speed), LE W32 package
2.5L / 151 inline-four (LR8)	110 hp net	Grand Am LE

1991 Grand Am engines

Engine	Rated	Offered in
2.3L / 138 inline-four (LD2)	160 hp net	Grand Am LE (optional), SE with automatic
2.3L / 138 inline-four (LG0)	180 hp net	Grand Am SE (5-speed), LE W32 package
2.5L / 151 inline-four (LR8)	110 hp net	Grand Am LE

gen4 N-body (1992–1998)

1992 Grand Am engines

Engine	Rated	Offered in
2.3L / 138 inline-four (L40)	120 hp net	Grand Am SE
2.3L / 138 inline-four (LD2)	160 hp net	Grand Am SE (optional, automatic), GT (automatic)
2.3L / 138 inline-four (LG0)	180 hp net	Grand Am GT
3.4L / 204 V6 (LG7)	160 hp net	Grand Am SE, Grand Am GT, (option)

1993 Grand Am engines

Engine	Rated	Offered in
2.3L / 138 inline-four (LD2)	—	Grand Am SE (optional, automatic), GT (automatic)
2.3L / 138 inline-four (L40)	115 hp net	Grand Am SE
2.3L / 138 inline-four (LG0)	175 hp net	Grand Am GT
3.4L / 204 V6 (LG7)	160 hp net	Grand Am SE, Grand Am GT, (option)

1994 Grand Am engines

Engine	Rated	Offered in
2.3L / 138 inline-four (LD2)	—	Grand Am SE (optional, automatic), GT (automatic)
2.3L / 138 inline-four (L40)	115 hp net	Grand Am SE
2.3L / 138 inline-four (LG0)	175 hp net	Grand Am GT
3.1L / 191 V6 (L82)	155 hp net	Grand Am SE, Grand Am GT, (option)

1995 Grand Am engines

Engine	Rated	Offered in
2.3L / 138 inline-four (LD2)	150 hp net	Grand Am SE, Grand Am GT
3.1L / 191 V6 (L82)	155 hp net	Grand Am SE, Grand Am GT, (option)

1996 Grand Am engines

Engine	Rated	Offered in
2.4L / 146 inline-four (LD9)	150 hp net	Grand Am SE, Grand Am GT
3.1L / 191 V6 (L82)	155 hp net	Grand Am SE, Grand Am GT, (option)

1997 Grand Am engines

Engine	Rated	Offered in
2.4L / 146 inline-four (LD9)	150 hp net	Grand Am SE, Grand Am GT
3.1L / 191 V6 (L82)	155 hp net	Grand Am SE, Grand Am GT, (option)

1998 Grand Am engines

Engine	Rated	Offered in
2.4L / 146 inline-four (LD9)	150 hp net	Grand Am SE, Grand Am GT
3.1L / 191 V6 (L82)	155 hp net	Grand Am SE, Grand Am GT, (option)

gen5 N-body (1999–2005)

1999 Grand Am engines

Engine	Rated	Offered in
2.4L / 146 inline-four (LD9)	150 hp net	Grand Am SE, SE1
3.4L / 207 V6 (LA1)	170 hp net	Grand Am SE1 (optional), SE2, GT (1999)

2000 Grand Am engines

Engine	Rated	Offered in
2.4L / 146 inline-four (LD9)	150 hp net	Grand Am SE, SE1
3.4L / 207 V6 (LA1)	170 hp net	Grand Am SE1 (optional), SE2, GT (1999)
3.4L / 207 V6 (LA1)	175 hp net	Grand Am GT, GT1

2001 Grand Am engines

Engine	Rated	Offered in
2.4L / 146 inline-four (LD9)	150 hp net	Grand Am SE, SE1
3.4L / 207 V6 (LA1)	170 hp net	Grand Am SE1 (optional), SE2, GT (1999)
3.4L / 207 V6 (LA1)	175 hp net	Grand Am GT, GT1

2002 Grand Am engines

Engine	Rated	Offered in
2.2L / 134 inline-four (L61)	140 hp net	Grand Am SE, SE1
3.4L / 207 V6 (LA1)	170 hp net	Grand Am SE1 (optional), SE2, GT (1999)
3.4L / 207 V6 (LA1)	175 hp net	Grand Am GT, GT1

2003 Grand Am engines

Engine	Rated	Offered in
2.2L / 134 inline-four (L61)	140 hp net	Grand Am SE, SE1
3.4L / 207 V6 (LA1)	170 hp net	Grand Am SE1 (optional), SE2, GT (1999)
3.4L / 207 V6 (LA1)	175 hp net	Grand Am GT, GT1

2004 Grand Am engines

Engine	Rated	Offered in
2.2L / 134 inline-four (L61)	140 hp net	Grand Am SE, SE1
3.4L / 207 V6 (LA1)	170 hp net	Grand Am SE1 (optional), SE2, GT (1999)
3.4L / 207 V6 (LA1)	175 hp net	Grand Am GT, GT1

2005 Grand Am engines

Engine	Rated	Offered in
2.2L / 134 inline-four (L61)	140 hp net	Grand Am SE, SE1
3.4L / 207 V6 (LA1)	170 hp net	Grand Am SE1 (optional), SE2, GT (1999)
3.4L / 207 V6 (LA1)	175 hp net	Grand Am GT, GT1

Working on one of these engines?

• Engine displacement from bore and stroke
• Static and dynamic compression ratio
• Which camshaft for your build
• What size carburetor
• Horsepower to torque at any RPM
• Torque converter stall speed

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