Talk:Hennessey Venom GT/@comment-94.194.87.95-20160427192107/@comment-26715739-20160428122924

My personal guess from having looked at the patterns across a number of different cars is that engine will be 0.5.

We might be lucky and one of the last 2 engine upgrades is 0.4 however the problem then is that only exhaust and suspension have a final gold upgrade.

From what I can see, exhaust and suspension pretty much always have a higher PR than engine (with some older cars being an exception). So the maths just doesn't work out.

Brakes and body are your usual best bet for lowest PR increase per upgrade (not looking at cost here, just PR increase per upgrade) - but both of those have an R$ upgrade as last upgrade.