Oldsmobile Diesel V8 Specs: 4.00 x 3.50 in

Oldsmobile Diesel V8 specs: 4.00 x 3.50 in (101.6 x 88.9 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.

At a glance

Displacement	350 ci
Cylinders	8
Bore	4.000"
Stroke	3.500"
Compression	22.5:1
Advertised power	105–125 hp
Years	1978–1985

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
LF9	350 ci	4" × 3.5"	22.5:1	120
LF9	350 ci	4" × 3.5"	—	105–125

Factory cars with a Diesel V8

• Chevrolet C/K Pickup: 1978, LF9, 120 hp; 1979, LF9, 120 hp; 1980, LF9, 125 hp; 1981, LF9, 125 hp
• Oldsmobile Cutlass: 1979, LF9, 120 hp; 1980, LF9, 105 hp; 1981, LF9, 105 hp; 1983, LF9, 105 hp; 1984, LF9, 105 hp; 1985, LF9, 105 hp
• Chevrolet Caprice: 1980, LF9, 105 hp; 1981, LF9, 105 hp; 1982, LF9, 105 hp; 1983, LF9, 105 hp; 1984, LF9, 105 hp
• Chevrolet Impala: 1980, LF9, 105 hp; 1984, LF9, 105 hp
• Pontiac Grand Prix: 1981, LF9, 105 hp; 1982, LF9, 105 hp; 1983, LF9, 105 hp; 1984, LF9, 105 hp
• Chevrolet El Camino: 1982, LF9, 105 hp; 1983, LF9, 105 hp; 1984, LF9, 105 hp
• Chevrolet Monte Carlo: 1982, LF9, 105 hp; 1984, LF9, 105 hp

What varies across the family

All are oversquare — bore larger than stroke, which favours revs over low-end torque.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

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