15 Most Powerful Coupes

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5. 2015 Mercedes Benz SL-Class

This model comes with a V-6, 3.0 L twin turbo and 7-speed automatic transmission. It is quite powerful – develops 329 horsepower at 5250 rpm. There are some other cool features, like ABS, electronic stability control, collision prevnetion assistance, plenty of airbags (including knee airbags for both the driver and passenger).  This car is not really a sports car, it is more like a luxury vehicle with some sports features. It is a good mixture of power and elegance.