An increase in top speed isn’t going to help on most tracks and challenges. Engine upgrades tend to offer better results in top speed, but less in terms of acceleration. In a lot of the races in RR3, lower 0-60 times will benefit much more than being able to go 195mph. The start is crucial, and getting away from the line and up to racing speed quicker will ultimately gain you more places in the early part of the race, and being able to pull away from corners quicker than your opponents will help you consolidate your position once you’ve passed them. So, look to upgrading the drivetrain before the engine, get that 0-60 time down. Also look at combining this with reducing the weight of your car.
This article uses material from the iMore and is licensed under the Creative Commons Attribution-ShareAlike License