I think Ridge Racer 6 seemed a bit too futuristic to me. That coming from a guy who raced the Lizard Nightmare (RR Type 4), Assoulto(?) Vulcano (RRT4), the Rivelta Crinale (RRV), and the Kamata Angelus (RRV). The series almost always had these outlandish vehicles you could race. The most outlandish in "Ridge Racer Type 4" is hands-down... Terrazi. Their vehicles were completely strange looking and even interesting. The Terrazi Starlight (a car modeled like a 1960s F1 race car) was certainly memorable.
The cars aren't real, but you can almost piece together elements from cars to come up with this unique model. For example, take the Danver Toreador in Ridge Racer V. This car looks more like a 1995-1998 Ford Mustang on the sides with the side vent, then it has taillights like the 1999 Subaru Impreza, and I can't remember the headlight resemblance too well. But some cars in Ridge Racer games just look like pieces and styles of past cars. There was even a car in RR Type 4 which can be thought of as a closed-cockpit Ferrari 333SP.
I think this should be old school Ridge Racer, only more futuristic. I don't want Ridge Racer to end up being like WipeOut, now. Don't overkill the futuristic theme like San Francisco Rush 2049 did.