Board Thread:Game Discussion/@comment-178.194.214.102-20160122010405/@comment-25956839-20160123155527

F40 is cheaper to upgrade, all except the last engine, see :


 * Upgrades Strategy For 100% Completion

It's also on the top menu now too, Navigation > Strategy > Upgrade Guide (Subjective)

These bloggs may help too:


 * User blog:RR3 Michael P/My car garage, upgrades and progress though RR3 - my progress and cars bought (May 2015)
 * User blog:Lancia Stratos/What to buy to get through the Career (From EXPERT onwards) - Lancia Stratos progress from Expert to Campionato Scuderia Ferrari Nov '15

The F40 is a must have car to farm the 4 lapper LM until the 10 lapper EK is unlocked. Happy racing :)