The phrase "of the engine" is a prepositional phrase that indicates ownership or association with something. In this context, it means that the car's performance was impressive due to its powerful engine.
A wide range of engine choices bring different personalities, but they're all refined and engaging. (consumerguide.com)
The 3 - Series offers a wide range of engine choices. (consumerguide.com)
The company has been experimenting with hydrogen versions of the engine for the past few years and has a small fleet of prototype models on the roads for real - world tests. (topspeed.com)