I’m a car racing nut, what can I say. Here are some images of the Porsche 919 Hybrid LeMans Racer. Look at how small the back end of the car is. The second image shows the tiny engine and how it is used to generate power to the batteries that feed the electric drive units on both axles.

Porsche 919 Hybrid LeMans Racer - Exterior

Porsche 919 Hybrid LeMans Racer - Power Unit