Complex sentence: With an 85 mm bore and 69 mm stroke, it mimicked the high-revving oversquare dimensions of the F40's V8, but with 4.7 L, it didn't need a turbo to produce 520 hp (388 kW).
Split into simpler sentences: With an 85 mm bore and 69 mm stroke, it mimicked the high-revving oversquare dimensions of the F40's V8. But with 4.7 L, it didn't need a turbo to produce 520 hp (388 kW).