Though smaller than both of its corporate siblings, the 2006 Land Rover Range Rover Sport gets the same set of engines as the range-topping Range Rover. Base Range Rover Sport HSE models have a 4.4-liter V8 with Variable Camshaft Phasing controlled electronically by the throttle. This unit generates 300 horsepower and 315 lb.-ft. of torque. Originally, this motor was developed from an existing Jaguar powerplant (a stablemate in the PAG), and is engineered for the rigors of severe off-roading duty.

Supercharged models get a Roots-type supercharger added to the V8, the displacement of which decreases to 4.2 liters as a result of different cylinder liners designed to withstand the extra boost. The bore has been narrowed, but the stroke of the cylinders remains the same. An output of 390 prancing horses and 410 lb.-ft. of torque contribute to the Supercharged model's top speed of 140 mph. In contrast, the HSE reaches a maximum velocity of 130 mph.

A six-speed automatic transmission determines gearing and is the only gearbox offered on the two 2006 Range Rover Sport models. This “intelligent” transmission includes adaptive mapping, to accentuate performance, as well as Command Shift operation, which will give you complete manual control – until you run it into the redline, that is. For a sporty feel, the shift lever sprouts from the forward portion of the center console and is canted toward the driver.

Permanent 4WD is bundled with Electronic Traction Control (ETC) and Dynamic Stability Control (DSC). These systems work in tandem with the throttle, transmission, brakes, and suspension to maximize traction. New is Active Roll Mitigation (ARM), which helps stabilize the vehicle when loads threaten an imbalance. ARM employs engine-powered hydraulic pumps to help keep the Range Rover Sport level and from leaning excessively when cornering. Supercharged models get this feature as standard equipment; HSE versions enjoy it optionally. Note that ARM is automatically disengaged when you are in low range and traveling over technical terrain with extreme approach and departure angles to reduce unnecessary suspension movement.

A standard height adjustable air suspension raises and lowers the new Range Rover Sport, allowing it to ford more than 27 inches of standing water while also easing entry and exit. Four-wheel-disc antilock brakes are sized 13.3- and 13.8-inches front and rear, respectively, in the HSE. For the Supercharged model, the discs are oversized, with 14.2-inch rotors up front and 13.8-inch plates in the back. Additionally, the Supercharged model’s four-piston front calipers are made by Brembo, a company renowned for producing effective racing brakes. These huge Supercharged-stopping binders fit inside 20-inch aluminum alloy wheels dressed in 275/40R20 rubber. Range Rover Sport HSEs ride on 19-inch rims and 255/50R series tires.