Well, I noted much less than I thought (got carried away with the driving missions...) But if you start with the Honda Fit, this is the partial dealer listing (all days have four dealers, but I only noted one or two on some days by looking back on the cars I purchased on those days):
01: Bentley Bugatti Chevrolet Polyphony Digital
03: Toyota TRD Triumph Volkswagen
05: Callaway FPV Honda Mitsubishi
07: Renault Subaru Toyota Volvo
09: Audi Nissan Toyota Trial
11: Mazda Scion Toyota Vauxhall
13: Ford Mercedes
15: Mini Nissan Honda
17: Lancia
19: Suzuki TVR
21:
23:
25: Honda (S2000 LM Race)
27:
29: Pontiac Nissan (GTR '09!)
31:
33: Ruf
35: Ginetta Nissan Subaru Toyota
37: Alfa Romeo Honda Lotus Mitsubishi
39: Jaguar Nissan Opera Spoon
41: Blitz Mazda Mugen Spyker (RX-8 LM In 787b Livery
!)
The Ferraris first show up somewhere between day 21 and 31. Not sure what day exactly...all I did was drool. TVR shows up close to Ruf. Pagani was in the teens somewhere. Citroen was in the 20s, I think.
No Lamborghini yet.