I heard that this car fits a turbo from a truck and easily converts to 700+ horsepower without any problem, but it will have high fuel consumption. However, this is just another opinion, I have not seen such a thing.
Just a remarke or suggestion, you should test drive the cars in various conditions and roads, so we can see how they handle. Your test drives are almost in the same conditions, theres no accelerations, no hard corners, we dont ear how the engine sounds or responds in such driving conditions.