GMC Detroit Diesel I6 (Two-Stroke) Engine Specs

Bore, stroke, displacement and compression for all 2 GMC Detroit Diesel I6 (Two-Stroke) engines. Compare variants side by side.

Engine	Displacement	Bore × Stroke	CR	HP
6-71	426 ci	4.252" × 4.4882"	18.7:1	238
4-71	284 ci	4.252" × 4.4882"	18.7:1	140

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