I just ran through the D-S2 Classes in Rivals to set a top 5% time for the free reward cars. I just did a flying lap or two in Road Racing on the Horizon Mexico Circuit.
Free Reward Cars for each class:-
D - 2020 Mustang Shelby GT500
C - 1995 BMW M5
B - 2008 Mitsubishi Lancer Evo GSR
A - 2007 Ferrari 430 Scuderia
S1 - 2005 TVR Sagaris
S2 - 2011 Mercedes-Benz SLS AMG
You get a bunch of accolades each time with the XP that goes with them. I didn’t make note of XP, but i think it was around 100k XP for each class, but i hadn’t raced in rivals at all before.
It’s not the hardest thing in the world even at the moment, but i’ve shared the quick tunes for the random cars i used, if anyone wants them. None have Aero and they don’t max out top gear down the motorway, so should be fine as All-Rounders.
D500 - 1981 Ford XR2
C600 - 2013 Toyota 86
B700 - 2009 Honda S2000 CR
A800 - 2017 Ford Focus RS
S1 900 - 2020 Chevrolet Corvette Stingray Coupe
S2 998 - 2018 Mclaren Senna