HOME OF -VIRTUAL STOPWATCH- THE VEHICLE ACCELERATION AND LAP TIME CALCULATOR

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VEHICLE PERFORMANCE QUIZ

For this little quiz we shall use the Mercedes E-Class as a basis, and performance figures independently tested by Autocar Magazine.

This car is available with both Diesel and Petrol Engines, having the following power and torque curves:

Vital Statistics:

Peak Power:  204 bhp (Diesel), 211 bhp (Petrol)

Peak Torque: 368 lbft (Diesel), 258 lbft (Petrol)

Weight: 1780* kg (Diesel) 1740* kg (Petrol) *as tested by Autocar Magazine

Gearbox: 7 Speed "7G-Tronic" automatic gearbox (Both cars)

Final Drive:  Optimised to suit each engine

Tyres: 245-45 Front and Rear (Both cars)

Body Style: Saloon (Both cars)

Drag Coefficient: 0.31 (Both cars)

 

Now Read the following Statements and click on the one you agree with the most:-

 

T1. The car with the Diesel engine has a very similar power:weight ratio as the petrol engined car,  however it has 40% higher torque:weight ratio therefore it will accelerate faster.  As both cars have a similar power:drag ratio and optimised final drive ratios they will have a very similar top speed.

 

T2 The car with the Diesel engine has a very similar power:weight ratio as the petrol engined car, however the Diesel engined car has more torque throughout the entire rev range, and since both cars have optimised  final drive ratios this means the Diesel engined car will accelerate faster and have a higher top speed than the petrol car.

 

T3. Since both cars have a similar power:weight ratio, the shape of both power curves is similar, both cars have optimised final drive ratios and both have the same drag, the acceleration and the top speed will be similar.

 

     

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