We’ll see the next Forza Monthly tomorrow so let’s have this list up to date before PGG announces another batch of cars returning to FH5… other than Audi Sport quattro S1, that is (it’s already confirmed) 
Changelog
Stinger +6, SVT Cobra +1, Mazda 3 +5, BMW 850 +5, Shelby 1000 +4, Esprit V8 +1, Subaru SVX +2, MB SL65 +2, BMW Z8 +1, Huayra +1, McLaren 12C +3, Audi S1 +5, Subaru BRAT +2, IS350 +3, VW ID R +6, WM Lykan +5, Mustang II +2, VX220 +1, Mazda RX-7 +3, AM DBS '08 +3, Evora +2, Ch. 300 +3, MB 300 SEL +3, Quadra +1, Hudson +4, BMW M635 +3, GMC Syclone +7, Cougar +4, AM Vantage V600 +3, Pontiac GTO +4, Mazda RX-3 +4, Firebird '68 +3, Clio V6 +2, Volvo 1800E +1, Porsche 928 +3, Cad. CTS-V +1, Chevy SS +2, Lexus IS F +5, Camaro '90 +6, TVR Tuscan +3, Genesis +2, Koen. CCX +3, AM V8 '86 +1, Mas. MC12 +6, XB Falcon +2, Touareg +4, AM Vanquish Zagato +1, Bowler +2, Ferrari F12 +3, Infiniti Q50 +1, Volvo S60 +2, DS3 +1, Opel GT +2, Firebird '73 +3, BMW 507 +2, DS 23 +1, Kadett A +1, Quartz +1, Dart +1, Esprit '77 +1, Kadett C +2, Clio '07 +1, Ford F-100 TT +1, Jeep Grand Wagoneer +5, Ch. Vega +3, Oldsmobile +5, Volvo 123 +3, Ram Runner +1, MG MGB +2, HSV GTSR '96 +1, Falcon XY +4, Mazda Cosmo +1, Rover +2, AM DB10 +1, Eldorado +2, Aero GT +1, Spitfire +2, AMC Hornet +1, AM DB4 +6, Camaro '16 +1, 356 RSR +1, Triumph TR6 +3, Ch. Valiant +1, HSV GTS '11 +3, AMC Pacer +1, AM Vanquish +1, Austin-Healey +3, Chevelle +2, GMC Typhoon +2, Elise +1, MB E350D +1, Aero SS +1, BMW i8 +1, Honda S800 +1, Hoon. Bronco +1, Ferrari 250LM +1, Ferrari FF +2, Terradyne +1, Range Rover +2, MB 280SL +1, Bentley EXP 10 +6, Ferrari 166 +1, Hoon. G8 Fiesta +2, Focus ST +1, Corolla +3, BMW Z4 +2, Ferrari 512S +1, Jag. XK120 +2, Hillman +1, Lotus 340R +2, Rossion +1, Saleen S5S +3, Silvia '66 +2, Por. 906 +2, Spania +2, Sub. VT15R +1, Triumph TR3 +1, Triumph TR7 +1, AM Vulcan +2, Austin FX4 +3, Datsun 2000 +2, Hol. FX Sedan +1, Sunb. Tiger +1, Ch. Nova +2, HW Studebaker +1, Lotus 2-Eleven +2, Maserati A6GCS/53 +5, Pl. Atomic +2, Por. 718 +1, Continental GT '13 +2, Ferrari Cal. +4, Hoon. G10 Fiesta +2, F-150 Shelby +1, Hol. FX Ute +2, Honda Ridgeline +2, HW Chevy LUV +2, Volvo IK +2, Austin 7 +2, Ferrari 500 +1, HW Loadstar +1, Tamo +1, TG Track-Tor +1, Urus Concept, MG MGA +4
Please note that some cars have new links after recent merging of voting threads: