I recommend the Nissan Fairlady 240ZG in the Race Class.

To reduce the grind later, you should work on upgrading a Derelict Car from the beginning. The first step is simple: play through the story. Step 1: Play through the Story (Any Difficulty) & Upgrade a Derelict Car to Level 399 After all else is done you won’t be anywhere close to Level 50 so be prepared for a long grind. Reaching REP Level 50 is the most time consuming task. Just drive along every road and you’ll unlock their locations on the map. The collectibles get marked on the map when you go near them. The main task for the platinum trophy is finding all collectibles and reaching REP Level 50.

The performance upgrades in this game are done through randomized cards that you earn for each win or by buying them at Tune-Up shops. You have 5 racing disciplines, each one requiring different cars (Racer, Drifter, Runner, Offroad, Drag). Welcome to the Need for Speed Payback Trophy Guide! NFS Payback is an Open-World Street Racing Game.

Nfs payback trophies