Six-wheel drive is an all-wheel drive drivetrain configuration of three axles with at least two wheels on each axle capable of being driven simultaneously by the vehicle's engine. Unlike four-wheel drive drivetrains, the configuration is largely confined to heavy-duty off-road and military vehicles, such as all-terrain vehicles, armored vehicles, and prime movers.
A United States Navy Oshkosh MTVR, a six-wheel drive military truck with full-time all-wheel drive and super-single tires on all axles
6-wheel British-manufactured military Alvis Stalwart 6×6 with three evenly spaced axles and full-time 6x6 H-drive
Mercedes-Benz G63 AMG 6x6 with twin rear axles
6x6 Tatra 93 (1938)
An all-wheel drive vehicle is one with a powertrain capable of providing power to all its wheels, whether full-time or on-demand.
The Jeep Wrangler is a 4×4 four-wheel drive vehicle equipped with a low-range gearbox, which provides the driver with a selection between low range or high range gearing
Hayes WHDX 70-170 6×6 tractor
The 8×8 tractor unit of the HETS (heavy equipment transport system)