lbs per hp
(from Audi Press
Release) The Audi A2 concept – premium-class space concept
with by-wire technology
• Plenty of room for
four people within a length of just 3.80 meters
• Matrix beam, dynamic light and an innovative, bright interior
• Powerful electric drive system and by-wire technology for
agile performance and long range
With the electric-only
powertrain of the A2 concept, Audi is offering another peek into the
future of electric mobility at the 64th International Motor Show
(IAA) in Frankfurt. The technical study features a classic,
premium-standard space concept that offers plenty of room for four
With the A2 concept technology study, Audi is offering a peek at
electric driving in the megacities of the future. The purely
electric powered A2 concept is a classic space concept: a premium
vehicle for metropolitan areas featuring generous amounts of space
and composed road manners.
The technology study is packed full with attractive, intelligent
technologies. An innovative body technology – a further development
of Audi’s ultra-lightweight construction – limits its weight to just
1,150 kilograms (2,535.32 lb). Audi connect technologies provide an
Internet connection; the steering and brakes are purely electric
The Audi A2 concept
demonstrates the complete skill set of the Audi designers in a
compact space. It is just 3,804 millimeters (149.76 in) long, 1,693
millimeters (66.65 in) wide and 1,494 millimeters (58.82 in) high;
even so, it makes it makes and elegant, powerful and sporty
impression on the road. As is typical for Audi, its clean appearance
concentrates fully on the essentials.
The opaque glass roof of the show car finished in flat Electric
White becomes transparent at the push of a button. When an electric
voltage is applied, small particles integrated into the glass align
so that the light can pass through the glazing unhindered. When the
glass roof is darkened, however, it blocks the infrared component of
the sunlight almost completely, effectively shadowing the interior.
This is a further contribution to efficient temperature management
in the purely electric powered Audi A2 concept.
As with every Audi, the front of the technology study is dominated
by the single-frame grill, in this case, in a special version
tailored to electrical operation. The upper two-thirds are designed
as a closed, folding surface, behind which are the charging socket
and the cooling water connection. The four Audi rings are
intensively sculpted; the engine hood is permanently bolted to the
Mounted in the lower section of the single-frame grille, which acts
as an air inlet, are highly efficient cooling elements made of
graphite foam. The lightweight mineral is an excellent conductor of
heat from the water to the ambient air. Eight blocks with six
graphite elements each are located in the central air inlet.
Another highlight of the A2 concept are the matrix beam LED
headlights. An entire bundle of small light-emitting diodes arranged
one above the other produce the low beam and high beam light.
Microreflectors enable the precise positioning of the light. The
LEDs can be switched on and off independently to illuminate the road
perfectly in any situation. Numerous mini-LEDs set in the lower
section of the headlight like a pearl necklace produce the daytime
The side view of the technology study is also typical Audi, with
brawny wheel wells, a low greenhouse and an early-sloping roof line
that ends in a long rear spoiler. Sharp lines frame tautly arched
sheet metal surfaces. The dynamic line above the sills rises
distinctly; the tornado line below the windows runs slightly upward.
Just below the tornado line is a characteristic feature of the Audi
A2 concept – the Audi dynamic light: a band of light that connects
the headlights with the tail lights.
Light-emitting diodes and light guides produce the Audi dynamic
light. When in standby-mode, the several centimeter-wide band
appears black. When the owner of the Audi A2 concept approaches, it
lights up blue in welcome and focuses on the door handles, which are
inset into the band and extend when the driver swipes a hand over
The dynamic light shines bright orange when the A2 concept is
driving. It pulses on the corresponding side when indicating a turn,
and when braking, a red pulse of light runs along the flank as a
warning for other road users.
The tail lights also use matrix beam technology. They are adaptive:
The system uses a sensor to detect how good visibility is and
adjusts the brightness accordingly.
Five laser diodes produce the rear fog light. When visibility is
good, their light is invisible. In the fog or rain, however, it
strikes the water particles in the air and becomes clearly visible
as a floating triangle.
The interior also
reflects the philosophy behind the Audi A2 concept. It is light,
clean, open, and spacious with intuitive controls. The dashboard is
split into two sections, with the semi-circular left section
enclosing the driver’s area. The Audi dynamic light runs along the
edges in two separate arcs from the doors to the cockpit. It
welcomes the passengers in a manner similar to the light band on the
The architecture of the interior takes advantage of the
possibilities afforded by the electric drive system. There is no
center tunnel; the console between the front seats can be lowered to
allow free passage through the vehicle. Heating and cooling air
flows indirectly and draft-free through a perforated surface beneath
The steering wheel of the Audi A2 concept is flattened at the top
and bottom, with a single spoke connecting the ring to the impact
absorber. The two large horns pointing inward have touch-sensitive
surfaces used to control key functions, with only the turn signals
and windshield wipers still controlled via the traditional steering
If both touchpads are touched at the same time, the A2 concept
switches into a semi-autonomous driving mode. This convenience
feature is a welcome relief in slow-moving traffic, for example. The
driver maintains full control of the vehicle at all times, exactly
like with today’s ACC stop & go system on which the new technology
An open, shell-like section serves as the steering column and
extends horizontally into the cockpit. On the far end is a
seven-inch display flanked by two secondary displays with the
speedometer and the power meter.
When the driver pushes the button to activate the electric drive, an
animated band of light encircles the driver and passenger, and two
touchpads fold up to the right of the steering wheel. The small
touchsurface on the left is for shifting gears (shift-by-wire); the
larger one on the right is reserved for the air conditioning and
The retractable console between the seats includes an additional
touchpad for entering letters and numbers and for secondary
functions – a further development of today’s MMI touch. A docking
station for the iPhone rounds out the control concept.
The show car has all of the Audi connect technologies on board. The
Bluetooth online car phone connects it to the Internet via a UTMS
module, a WLAN hotspot lets the passengers surf and e-mail from
their mobile devices. The fast data connection delivers specially
prepared news and information to the vehicle. The services currently
offered by Audi are available for navigation: the map with images
from Google Earth, Audi traffic information online, Google POI
search via voice control and Google Street View.
Cutouts in the backrests of the four individual seats in the Audi A2
concept give them a sporty look and make them incredibly light. They
have an aluminum chassis and the developers used a polymer
blow-molding process for the shells. Three struts connect the seats
with the floor for more foot room in the back, and there are storage
bins beneath the fold-up seat cushions.
A console with storage bins is located between the rear seats.
Folding these seats forward reveals a fixture for the fork of a
special city bicycle. The luggage compartment of the Audi A2 concept
has a sandwich floor. A fold-up frame with two solid, high-load nets
covers the lower load level.
The colors and materials in the interior support the impression of
lightness and functionality. The large areas from the door top
shoulders to the floor are covered in a tough material with a
neoprene surface feel. A ribbed material made from recycled
polyester covers the central floor area. Aluminum elements
accentuate the cockpit.
The Audi A2 concept is a
purely electric vehicle. The lithium-ion battery mounted in the
sandwich floor stores 31 kWh of energy, 24 kWh of which are usable.
The electric motor is transversely mounted in the front of the
vehicle. It delivers 85 kW (116 hp) of peak power (60 kW continuous)
and 270 Nm (199.14 lb-ft) of torque (160 Nm (118.01 lb-ft
continuous) to the front wheels via a single-speed transmission.
The Audi technology study has a range of 200 km (124.27 miles) in
the European driving cycle. It takes roughly 1.5 hours to fully
recharge the battery with 400 volt three-phase current and
approximately four hours with 230 volt household current. The Audi
A2 concept is also designed for the new contactless charging
technology (Audi Wireless Charging).
The show car weighs less than 1,150 kilograms (2,535.32 lb). This is
due primarily to its body, which features the most advanced state of
Audi’s ultra-lightweight construction. The A2 concept marks the
first time that the ASF has been combined with hybrid multimaterial
construction, in which very different materials are combined with
one another. In this case, the superstructure is made largely of
aluminum components and is complemented by add-on parts of carbon
fiber-reinforced polymer (CFRP).
The Audi A2 concept is an agile vehicle. It accelerates from 0 to
100 km/h (62.14 mph) in 9.3 seconds; top speed is limited to 150
km/h (93.21 mph) in the interest of range. A McPherson strut front
suspension and a torsion beam axle in the back provide for agile
handling. The steering and brake systems are purely electric
(steer-by-wire and brake-by-wire), requiring no mechanical or
hydraulic connection to the steering wheel or the pedals,
The 18-inch wheels are fabricated using cladding technology. The
alloy base wheel and the cladding are manufactured separately and
bonded together, greatly reducing the amount of material used. The
new hybrid technology, which Audi already uses in some production
models, saves roughly two kilograms (4.41 lb) per wheel. The wheels
of the A2 concept combine the blade look of the e-tron family with
Audi’s classic spoke design.