C6W - The Six Wheel Sports Car: Ferruccio Covini conceptualized the original idea in '74, but the project was abandoned in favor of the Soleado project. The C6W is a two-seater with four wheels in the front, weighs just 1,150kg, has an Audi 4.2 litre V8 motor and is capable of reach speeds in excess of 300km/h. The prototype was introduced in 2004 at the Geneva Motor Show and now the vehicle is set for commercial production.
1977 Panther 6: This six-wheeled convertible is powered by twin turbo 8.2 litre Cadillac V8, with a claimed top speed of 200mph+.
T-Rex: "It's powered by a V10, pumping out 350hp and 500 ft. lbs. torque. It breaths through a custom snorkel and Flowmaster dual exhaust. It has three 2.5 ton Rockwell axles with Detroit Lockers in each axle. Its only weakness is turning radius. This will be fixed with upcoming 6 wheel steering."
Six-Wheel Hummer: It's called the Hummer Blindado, outfitted by Security Pro USA, and it carries up to eight people. The extra two wheels provide the car with additional stability, according to the maker.
(Image credit: Credit).
Citroen's Six Wheel Cruise Crosser: It's an all-terrain concept car, features three axles and six wheels to tackle the roughest possible road and weather conditions. It also features an advanced satellite navigation system and DVD player.
Citroen Six Wheels: The owner of the car has told the interesting story of how he converted a standard Citroen estate into a 'loadrunner' - Link
Six Wheel Camaro Sport Wagon: Roly Fernandez-built 1988 Camaro with dual rear axles.
(Image credit: cardomain).
Vityaz Transporter: It's an all terrain Russian car, sure to take on roughest possible road.
2004 Mini XXL Stretch Limo: This six-wheel limo is six metre long, features the John Cooper Works Tuning Kit and was built by a specialist coach builder in Los Angeles.
Six wheel Range Rover:
The Tyrrell P34 (Project 34): Derek Gardner designed the six-wheel F1 car (commonly known as Project 34). "The car used specially manufactured 10-inch diameter wheels and tyres at the front with two ordinary sized wheels at the back." Just coming to think of it, if Derek Gardner had succeeded in his 6-wheel F1 car project, how different the F1 could have looked today!
March 2-4-0: This car followed on from a previous effort by Tyrrell P34 to introduce a six-wheeled car to F1 racing. The March Engineering Company of Bicester, UK, built it. But, the engineering concept behind the 2-4-0 was quite different.
Pat Clancy Special: Powered by a Meyer-Drake engine, it sported no less than six wheels; it was raced at the Indianapolis 500 in 1948. "The four wheels at the back were driven by two axles connected by a universal joint, making the Pat Clancy Special a four-wheel drive car."
Six-Wheel Pullman: "This six-wheel Pullman roamed York-area streets before giving way to thousands of four-wheel models." (Photo courtesy of York County Heritage Trust.)
More than Six Wheels:
Eliica: It's an electric vehicle concept car designed by a team at Keio University in Tokyo. The 5.1 m (17 ft) car can accelerate from 0-100 km/h (62 mph) in four seconds (faster than the Porsche 911 Turbo at the time).
KAZ: It's a 6.7 m (22 ft) limousine-sized 8-wheel electric vehicle prototype, and Eliica is a refinement of it. This eight-wheeler is equipped with eight wheels and six of them are intended for turning, all of which are powered by an electric motor. It's a luxury limousine concept introduced last 2001.
(Image credit: wiki).
Luxurious Limo: 8 wheel