The Pig ('Rote Sau', Red Pig in German, I believe) was the name AMG's first spot in the limelight earned at Le Mans...the big 'Benz:
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It's "only" two-mil but you really gotta get it tuned to bring home the win. Should be able to crack 210 or so in the draft but it's only a 5-speed (as most relics are) so getting it dialed in is kinda rough. Obviously throw all the power at it and ditch all the weight.
Easiest wins are the P4 and the XJ-13. The 300 pictured above can do it but you gotta work a little. The benefit of the Ferrari and Jag being the seconds it saves you completing the race. Ferrari can do it sub-7'25" and the Jag can run below 7'26". The 'Benz is in the mid-40's. And both the Ferrari and Jag require a good bit of tuning to really get them flyin'...I've seen a little over 230 in the Jag and better than 235 in the Ferrari. Cruising all alone (no draft) the Jag runs high teens and the Ferrari mid 220's. That's what I've been able to get out of them, anyway. Much more gear and the unassisted speed starts to suffer.
I've not had great luck with the Daytona, 365, etc. You can get it done but it usually came at the cost of the CRB so was defeating the purpose. Again, that's just for me, though.
Sorry, likely WAY more info than you wanted but I spent a lot of time churning through points there...had to make it fun somehow. Decided to see how fast I could get some of these iconic slabs-o-metal rollin'. 😁
EDIT: Also wanted to mention that the Gr.1 Challenge in the Professional League is a pretty good yield on races, too. Kyoto Driving Park takes about 10 minutes and can net you around 10K points, if remembering correctly. Plus, it's Gr. 1's.