Simplify the following text for a Grade 8 native English-speaking person.
Original: In rallying , turbocharged engines of up to 2000 c have long been the preferred motive power for the Group A\/N World Rally Car competitors , due to the exceptional power-to-weight ratios attainable .
Simplified: World Rally Car racers have long preferred turbocharged engines . They offer a very high power-to-weight ratios .