Technology – drive system of the T-ROC

Strong and efficient. The T-ROC is powered by a torque-strong and fuel-efficient turbodiesel engine: the 2.0 TDI with 135 kW / 184 PS, the engine that is also used in the sporty Golf GTD. In the concept vehicle, the high-tech diesel delivers a top speed of 210 km/h, acceleration to 100 km/h in 6.9 seconds and a ample torque to the two driven axles (380 Nm from 1,750 rpm). This contrasts with a combined fuel consumption figure of 4.9 l/100 km (equates to 129 g/km CO2). A 7-speed dual-clutch gearbox (DSG) handles the transmission of engine power to the 4MOTION all-wheel drive system.

4MOTION all-wheel drive. In normal operation, the 4MOTION all-wheel drive system, which is equipped with the latest Haldex coupling, transfers nearly all of the engine’s power to the front axle. That is very fuel-efficient. Nonetheless, even in this situation the 4MOTION system continues to be a permanent all-wheel drive solution, because the rear axle momentarily receives more power as soon as slip is detected at the front wheels or the sensors of the T-ROC detect an increase in transverse acceleration. 4MOTION utilises pre-control strategies depending on the specific driving state. This system variably engages the rear axle in fractions of a second via the Haldex coupling whenever necessary.

“Street” / “Offroad” / “Snow”. The T-ROC is equipped with three driver-selectable driving modes: “Street”, “Offroad” and “Snow”. Parameters of the running gear, engine-gearbox unit and hill start and hill descent assist systems are modified depending on the mode. The desired mode is activated via an intuitive turn wheel control on the DSG gear shift grip; the mode that is active is indicated in a pop-up window in the digital instrument cluster.

“Street”. The standard mode is known as “Street”. The all-wheel drive only directs power to the rear axle if traction or transverse acceleration makes it necessary.

“Offroad”. In “Offroad” mode, off-road driving can be optimised at the push of a button. This mode presets the power distribution between the front and rear axles to 50:50 and activates an entire network of assistance systems. The systems integrated here include hill descent assist, hill start assist, more sensitively metered accelerator pedal response, preselection of gears with DSG and ABSplus. The latter utilises a different pulsing frequency on loose road surfaces, which contributes towards reducing braking distance – e.g. on gravel hills. The cameras at the front and rear can also be activated in Offroad mode.

“Snow”. When the vehicle is used to go skiing, the “Snow” mode offers an advantage in terms of active safety. As in the “Offroad” mode, in this case the all-wheel drive system switches to a 50:50 power distribution by default. The ABSplus system is also activated. At the same time, the parameter maps for the engine and gearbox are modified for the very low traction that occurs while driving on snow.