The Mahindra Scorpio Classic S variant has an engine power of 114.4 bhp and is powered by a 2179cc, 4-cylinder diesel engine. It comes with a 6-speed manual gearbox and has a mileage of 16.36 kmpl. 

On the other hand, the Mahindra Scorpio Classic S11 variant has an engine power of 140.2 bhp and is powered by a 2179cc, 4-cylinder diesel engine. It comes with a 6-speed manual gearbox and has a mileage of 17.45 kmpl. The difference between the two variants is the engine power and the resulting mileage. The S11 variant has a higher engine power and a higher mileage compared to the S variant.