The Ring Taxis (there are two) are V10 BMW M5s with modified suspension and brakes, one of them driven by Sabine Schmitz (formerly Sabine Reck). Both come highly recommended, but Sabine is said to be faster. A lap costs €180, but can take three passengers so it's pretty good value split three ways. In fact, it's excellent value as it is reputed that it costs BMW €480 per lap. (Following an accident years ago in which either a wheel or suspension component failed, BMW changes the tyres every 10 laps, the brake-pads every 20 laps and the suspension every 50 laps. The cars are replaced annually.)
The current Ring Taxis surprisingly don't have rollcages. When we asked Sabine about this, she said the structure was very strong and there are airbags everywhere.
You can also buy a passenger lap in a Zakspeed Viper, though this is incredibly expensive at €260! The car is not actually the 24H race car, but a second Viper stickered-up to look like the race one. It certainly looks fast, but not €260's worth!
