The problem has been a real one in F1. Ferrari was faced with the dilemma when engine size was reduced from 3.5 to 3 litres to continue with the V12 or to go down to a V10 or even a V8 (like the venerable Cosworth DFV). After extensive testing it was found that the slightly better revving capacity (shorter stroke, lower piston speeds) and therefore higher top power output of the V12 was offset by the weight savings for the V10, (shorter block, 2 less cylinders and valve train) and in spite of the traditions linked with a Ferrari V12 it was decided to go for 10 cylinders only. At the beginning of the 3.5 litre class in 1989 Renault made the same calculations for the differences between a V10 and a V8 and choose for the V10.
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