Revealed at the 1972 Paris Auto Show, the Carrera 2.7 RS was a special model used to homologate the 911 in Group 4 racing. Developed from the 911S, the 2.7 was more potent in almost every area. Compared to the standard Carrera, the 2.7 RS featured a larger engine, wider flares to accommodate the Fuchs alloy wheels, stiffened suspension, larger brakes and a ducktail rear spoiler.
In terms of driving, the Touring is similar, but just a bit more civilized and refined. The RS Touring ride is slightly softer and thus more comfortable. Creature comforts such as more comfortable seats, power windows, proper door handles, a sunroof, and a passenger-side sun visor all add up to it being more livable daily. The additional undercoating also makes the Touring easier on the ears as well.