Innovation from the quattro pioneer: twin motor with electrical torque vectoring
The drive has been programmed for efficiency in everyday life; in normal driving mode, only the rear electric motors work. The front-drive is unpowered but switches itself on – with the driver barely noticing – if the driver needs more power. It also switches on predictively if the grip declines. It does so when friction values are low and during rapid cornering. The electric all-wheel drive is complemented by a further technological innovation in the form of electrical torque vectoring, which brings the advantages of the conventional sport differential into the electric era. Each one of the rear electric motors sends the drive forces directly to the wheel via a transmission; there is no longer a mechanical differential. Forty years after the launch of quattro technology, Audi is thus raising the principle of the four powered wheels to a completely new level of technology. The result: more agile driving and self-steering characteristics, and thus a higher cornering speed.
One further advantage is the traction. If, during acceleration, a rear-wheel comes into contact with a road surface with a low friction value, i.e. if the road surface is covered in black ice or has a loose subsurface, the torque can be distributed precisely and quickly between the two motors. The full torque is gradually distributed to the wheel with powerful traction, while the wheel with low traction continues moving with almost no torque.
The two prototypes of the e-tron S models drive on 20-inch alloy wheels in the 5-V-spoke S design as standard. Different wheels up to 22 inches in size are available on request. To achieve an S-typical transverse dynamism, the tire widths in the sizes 20 inches, 21 inches, and 22 inches have all been enlarged to 285 mm. Black brake calipers with a red S rhombus, with six pistons at the front in each case, grip the large brake discs (front diameter: 400 mm). A further standard feature is the progressive steering – its ratio becomes more and more direct, the further the driver turns the steering wheel. The front and rear axles have been created as a five-link design. Harmonization of the elastokinematics and of the dampers has also been optimized for the S models. In order to even further reduce the rolling movements during cornering, the stabilizers on both axles have been enlarged.
Up to 150 kW: peak power, even during charging
When the driver is on the road, the electric S models can be charged with up to 150 kW of direct current power (HPC), such as in the UK and European Ionity network. This means that charging from 5 to 80% only takes around half an hour. An important factor for this is the elaborate thermal management system with a standard heat pump, which cools and heats the battery, the interior and the electric motors with four circuits. In addition, the Audi models will also be able to charge with up to 11 kW of alternating current (AC).
The Audi e-tron Charging Service guarantees convenient access to more than 140,000 public charging points in 24 European countries on request – with nothing more than a charging card. In the first year, Audi e-tron customers benefit from a year’s subscription to the transit tariff, which also offers access to high power charging columns. In addition, all new e-tron and e-tron Sportback customers ordering between 1 January and 31 December 2020 can receive £150 credit on their accounts, which translates into approximately 1,000 miles of free electricity.
In addition, all e-tron models currently benefit from a free wall box offer applicable to new customer orders placed from 1 January 2020. The Pod Point Universal socket 7kW Solo wall box (RRP of £879) enables overnight charging of the e-tron three times faster than using a domestic wall socket, and Audi UK will cover the cost of installation once the OLEV EVHS grant has been applied*.
Optical statement: widening the wheel arches
The powerful and dynamic design of the e-tron S models features the progressive Audi design vocabulary, which emphasizes the strong contours of the wheels. Details such as the octagonal Singleframe, which is, for the most part, sealed and painted bright grey, move the design into the electric era. At the lower edge of LED headlights, four struts create the e-tron-specific signature in the daytime running lights. The S models’ leading role can be seen straight away. The front and rear bumpers are heavily contoured, while the diffuser insert runs almost the full width of the vehicle. The bumper is flanked by bigger and more expressive air curtains, which improve airflow. They extend below the headlights, thereby creating a dynamic appearance even from a distance. On both sides, the wheel arches are a 23 mm wider. Silver-colored elements – from the lip of the front bumper, the Singleframe and the door inserts right up to the diffuser – emphasize the vehicle’s features. Audi will paint larger detachable parts in a contrasting color on request.
Both S models are available, on request, with the digital Matrix LED headlights, a worldwide first in mass production. Their light is dispersed into small pixels and can be controlled with high precision, and this facilitates many new functions such as lane and orientation light. In narrow areas, for example, it shows the car’s position in the lane and thus helps the driver to remain in the center.
Progressive: the interior and equipment
The interior of the future e-tron S models has been kept in dark colors. A large arc connects the displays of the virtual external mirrors with the bonnet above the Audi virtual cockpit. The instrument panel is driver-oriented, the middle tunnel’s console rests on open sidewalls. The electrically adjustable Valcona leather sport seats and the gear selector lever feature a rhombus S embossing. The door sills and steering wheel feature S badges. On request, Audi can offer a supersport seat in leather with a rhombus pattern in black, rotor grey or Aras red, as well as an air-conditioned customized contour seat with perforated leather.