This is a no brainer
Audi Quattro Sport
The Audi Quattro has had one of the greatest impacts in the history of motor sports. The car essentially revolutionized rally racing, making all-wheel drive an essential part of a rally car. The road-going Quattro, first built in 1980, was also the first mass-produced all wheel drive car. The Sport Quattro, first appearing in 1984, was built to homologate a short-wheelbase Quattro racing car that would eventually go on to win the 1984 World Rally Championship with Stig Blomqvist at the wheel.
In appearance, the Sport Quattro differed from the standard version by its extra hood scoops and bulging wheel wells. White 15-inch multi-spoke wheels also gave the car away. The shortened wheelbase, however, was probably the most noticeable feature.
Chopping 12.6 inches off the standard Quattro in order to save weight, Audi essentially made the Sport Quattro a 2-seat car. Other weight-saving measures include Kevlar body panels. The hood and front and rear fenders are made of the lightweight material while the rest of the car is made of steel. The Sport Quattro is relatively light, tipping the scales at just over 2850
pounds. Weight distribution is very much toward the front of the car (62.1% front, 37.9% rear), giving the car a tendency to understeer. With the short wheelbase, however, lift-off oversteer can be easily achieved.
Oversteer can also be induced by slamming the throttle out of a turn using the extra power of the 2.1 liter turbocharged inline-5. While the standard Quattro model had a sufficient 200 horsepower, the Sport Quattro had an astounding 306 bhp @ 6700 rpm and peak torque is 258 lb-ft @ 3700 rpm due to a KKK K27 turbocharger.
While these figures are considered the norm by today's standards, the Audi Sport Quattro was one of the most powerful road-going cars of its time.
With traction being split 50-50 between the front and rear wheels, the Sport Quattro not only had good grip in the corners but also off the line. This, combined with the extra power from the turbocharged engine, allowed the Sport Quattro to lay down some impressive performance times. 60 mph comes up in only 4.8 seconds, the century mark is passed in 12.6 seconds, and a 1/4 mile drag strip can be conquered in a mere 13.5 seconds at 104 mph.
Top speed is limited to 155 mph due to the brick-like aerodynamics of the car.
The price tag of the Sport Quattro was just as astounding as its performance. Audi's original price for the car in 1984 was set at $75,000. However, with only 170 customer cars being built, the Sport Quattro has maintained its value over the years and cars in good condition will go for a price similar to the original. Overall, 200 Sport Quattros were built, with the thirty remaining cars being development or race cars.
Would the World Rally Championship be the same today if it weren't for the Quattro? Probably. Some other manufactuer would have discovered the advantage of using all four wheels to accelerate the car and put it to use soon enough. But Audi was the first company to employ an all-wheel-drive car successfully, and the Quattro will therefore go down in history as one of the greatest cars of all time.
End of Story
My 2nd Choice...the Audi S4