Plymouth Valiant Engines by Year

The Valiant was Plymouth's compact from 1960 to 1976 and the car that introduced Chrysler's slant six. It was sold as a separate Valiant brand in 1960 and as a Plymouth from 1961; the Duster, its coupe version, has its own page.

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

1960–1966: 1960 · 1961 · 1962 · 1963 · 1964 · 1965 · 1966

1967–1976: 1967 · 1968 · 1969 · 1970 · 1971 · 1972 · 1973 · 1974 · 1975 · 1976

1960–1966

The first Valiants used the 170 and, from 1961, the 225 slant six. The 273, Chrysler's first small-block V8, arrived in 1964, with a four-barrel Commando version from 1965.

1960 Valiant engines

Engine	Rated	Offered in
170 slant six	101 hp gross	V-100, V-200

1961 Valiant engines

Engine	Rated	Offered in
170 slant six	101 hp gross	V-100, V-200
225 slant six Added during the 1961 model year.	145 hp gross	V-200

1962 Valiant engines

Engine	Rated	Offered in
170 slant six	101 hp gross	V-100, V-200, Signet 200
225 slant six	145 hp gross	V-100, V-200, Signet 200

1963 Valiant engines

Engine	Rated	Offered in
170 slant six	101 hp gross	V-100, V-200, Signet 200
225 slant six	145 hp gross	V-100, V-200, Signet 200

1964 Valiant engines

Engine	Rated	Offered in
170 slant six	101 hp gross	V-100, V-200, Signet 200
225 slant six	145 hp gross	V-100, V-200, Signet 200
273 V8 Added during the 1964 model year.	180 hp gross	V-100, V-200, Signet 200

1965 Valiant engines

Engine	Rated	Offered in
170 slant six	101 hp gross	Valiant 100, Valiant 200, Signet
225 slant six	145 hp gross	Valiant 100, Valiant 200, Signet
273 V8	180 hp gross	Valiant 100, Valiant 200, Signet
273 V8	235 hp gross	Valiant 100, Valiant 200, Signet

1966 Valiant engines

Engine	Rated	Offered in
170 slant six	101 hp gross	Valiant 100, Valiant 200, Signet
225 slant six	145 hp gross	Valiant 100, Valiant 200, Signet
273 V8	180 hp gross	Valiant 100, Valiant 200, Signet
273 V8	235 hp gross	Valiant 100, Valiant 200, Signet

1967–1976

The 1967 redesign kept the slant sixes and small blocks; the 318 joined in 1968 and the 198 six replaced the 170 in 1970. Ratings are SAE net from 1972.

1967 Valiant engines

Engine	Rated	Offered in
170 slant six	115 hp gross	Valiant 100, Signet
225 slant six	145 hp gross	Valiant 100, Signet
273 V8	180 hp gross	Valiant 100, Signet
273 V8	235 hp gross	Valiant 100, Signet

1968 Valiant engines

Engine	Rated	Offered in
170 slant six	115 hp gross	Valiant 100, Signet
225 slant six	145 hp gross	Valiant 100, Signet
273 V8	190 hp gross	Valiant 100, Signet
318 V8	230 hp gross	Valiant 100, Signet

1969 Valiant engines

Engine	Rated	Offered in
170 slant six	115 hp gross	Valiant 100, Signet
225 slant six	145 hp gross	Valiant 100, Signet
273 V8	190 hp gross	Valiant 100, Signet
318 V8	230 hp gross	Valiant 100, Signet

1970 Valiant engines

Engine	Rated	Offered in
198 slant six	125 hp gross	Valiant sedan
225 slant six	145 hp gross	Valiant sedan
318 V8	230 hp gross	Valiant sedan

1971 Valiant engines

Engine	Rated	Offered in
198 slant six	125 hp gross	Valiant sedan, Scamp
225 slant six	145 hp gross	Valiant sedan, Scamp
318 V8	230 hp gross	Valiant sedan, Scamp

1972 Valiant engines

Engine	Rated	Offered in
198 slant six	100 hp net	Valiant sedan, Scamp
225 slant six	110 hp net	Valiant sedan, Scamp
318 V8	150 hp net	Valiant sedan, Scamp

1973 Valiant engines

Engine	Rated	Offered in
198 slant six	95 hp net	Valiant sedan, Scamp
225 slant six	105 hp net	Valiant sedan, Scamp
318 V8	150 hp net	Valiant sedan, Scamp

1974 Valiant engines

Engine	Rated	Offered in
198 slant six	95 hp net	Valiant sedan, Scamp
225 slant six	105 hp net	Valiant sedan, Scamp, Brougham
318 V8	150 hp net	Valiant sedan, Scamp, Brougham

1975 Valiant engines

Engine	Rated	Offered in
225 slant six	95 hp net	Valiant sedan, Valiant Custom, Brougham, Scamp
318 V8	145 hp net	Valiant sedan, Valiant Custom, Brougham, Scamp

1976 Valiant engines

Engine	Rated	Offered in
3.7L / 225 slant six	100 hp net	Valiant sedan, Valiant Custom, Brougham, Scamp, Scamp Special
5.2L / 318 V8 Published ratings for this engine vary.	145–150 hp net	Valiant sedan, Valiant Custom, Brougham, Scamp, Scamp Special
5.9L / 360 V8	220 hp net	Valiant A38 police package

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