Audi A4 Fourth Generation
|Assembly||Ingolstadt, Germany Aurangabad, India (CKD)Jakarta, Indonesia (Garuda Mataram Motor)|
|Body style||4-door saloon/sedan, 5-door Avant (estate/wagon)|
|Platform||Volkswagen Group B8 (MLB/MLP) platform|
|Transmission||6-speed Manual 6-speed Tiptronic 8-speed Tiptronic 7-speed S tronic 8-speed Multitronic|
|Wheelbase||2,808 mm (110.6 in) allroad: 2,805 mm (110.4 in) LWB: 2,869 mm (113.0 in)|
|Length||4,703 mm (185.2 in) allroad: 4,721 mm (185.9 in) LWB: 4,763 mm (187.5 in)|
|Width||1,826 mm (71.9 in) allroad: 1,841 mm (72.5 in)|
|Height||1,427 mm (56.2 in) Avant: 1,436 mm (56.5 in) allroad: 1,495 mm (58.9 in) LWB: 1,426 mm (56.1 in)|
|Related||Audi A5 Audi S4 (B8) Audi RS4 (B8)|
The B8 A4 is built on a variant of the Audi Modular Longitudinal Platform, a platform which is also used in the Audi A5 coupé. Whilst prior A4 chassis were limited in wheelbase due to the relationship between the engine, transmission and front axle, the MLP allows for a reduced front overhang, resulting in a greater wheelbase length without the same increase in overall length. This effectively redistributes the centre of gravity slightly rearwards, improving handling by better balancing vehicle mass between the front and rear axles. The estimated static front:rear weight ratio of the B8 A4 is approximately 55:45, depending on body style and engine. The relocation of the steering rack in front of the axle also improves handling over previous A4 platforms.
The B8 A4 has increased in wheelbase by 160 millimetres (6.3 in) and in length by 117 millimetres (4.6 in) over the prior B7, which has allowed for increased rear seating legroom. Although the overall dimensions have increased, the kerb weight has dropped some 10%. The boot (trunk) has also increased to 480 litres (17.0 cu ft) for the saloon (sedan) version. The A4 Avant will have a maximum capacity of 1,430 L (50.5 cu ft) with the rear seats folded down.
Reception has been mixed, with praise for the Audi A4's increased size, giving it best-in-class rear legroom and trunk space in the compact executive car segment. Its inline-4 2.0 TFSI engine, while efficient providing plenty of torque, was considered lacking and less refined compared to 6-cylinder engines of lighter rivals who posted faster acceleration times. However, the Audi S4 sports sedan has been well-received for its V6 3.0 TFSI engine's power and efficiency.
The B8 A4 was facelifted in early 2012, and is on sale now.
Audi released the first official pictures of the B8 series A4 in August 2007, and unveiled the car to the public at the September 2007 Frankfurt Motor Show. Saloon/sedan and Avant (estate/wagon) models are offered.
The Avant was unveiled to the public at the March 2008 Geneva Motor Show.
The A4L is a long-wheelbase version for the Chinese market, with a 60 mm (2.4 in) longer wheelbase and 50 mm (2.0 in) longer length.The vehicle was unveiled at the 2008 Guangzhou Motor Show. The production version then went on sale in January 2009. Launch models included a 2.0 TFSI with 132 kW (180 hp) and the 3.2 FSI with 195 kW (265 hp).
A4 allroad quattro
The A4 allroad quattro features a wider track, increased ground clearance, quattro permanent four-wheel drive, a distinctive radiator grille, stainless steel underbody guards and roof rails.
The A4 allroad quattro was made available in early summer 2009.The car was unveiled in 2009 Geneva Motor Show.
The A4-based convertible models were replaced by the A5/S5 Cabriolet.
The B8 powertrain options comprise of the following engines, transmissions and drivelines: (All United Kingdom specification unless stated otherwise).for South Africa specification).(for Australia specification) for New Zealand specification).The quattro permanent four-wheel drive system uses the latest Torsen T-3 centre differential, with a default 40:60 front to rear asymmetric torque distribution ratio (used first on the B7 RS4) as standard. (Previous A4 quattro models split torque with a default front:rear 50:50). The additional torque bias applied to the rear wheels helps mimic the driving dynamics of rear wheel drive cars.
Audi was reported to stop offering 3.2L V6 models in 2010 model year, but still offers them as of August 2011 (Germany).
All petrol engines use Fuel Stratified Injection (FSI), and all diesel engines use the common rail fuel delivery (with a pressure of 1,600 bars (23,000 psi)), with piezo injectors of their Turbocharged Direct Injection engines.
In 2009, Audi announced the seven-speed dual-clutch S tronic transmission as option for A4 in UK and European markets.
All A4L models include Speed 8 multitronic continuously variable/manual transmission, except for A4L 3.2 FSI quattro, which includes Tiptronic automatic transmission.
Standard equipment on the B8 A4 includes:
- LED daytime running lights (on some models);
- MMI system (Multi Media Interface) (multi-mode interface of driver information and entertainment systems)
- Electronic hand brake
- Speed sensitive power steering ('servotronic' - on some models)
- 3x3 point rear seat belts
- Alloy wheels
- Body coloured bumpers
- Climate control
- Driver`s airbag
- Electric mirrors
- Folding rear seats
- Front electric windows
- Front fog lights
- Heated mirrors
- Isofix child seat anchor points
- Passenger`s airbag
- Rear electric windows
- Remote locking
- Service indicator
- Side airbags
- Steering wheel rake adjustment
- Steering wheel reach adjustment
- Traction control
- Audi Lane Assist (lane departure warning system);
- Audi Side Assist (blind spot monitor);
- Adaptive Cruise Control (ACC);
- Advanced Key (keyless entry and start);
- Bang & Olufsen sound system (505W);
- Advanced parking system front and rear with reversing camera;
- Navigation system with full MMI with 7-inch (180 mm) screen;
- Adaptive headlights (with cornering technology);
- Audi Drive Select;
A4 TDI concept e (2008)
It includes a common rail 1,968 cc (120 cu in) TDI diesel engine rated at 120 PS (88 kW; 118 hp) and 290 N·m (210 lb·ft), a stop-start system and regenerative braking. It can achieve a fuel consumption of 3.99L/100 km (58.95 mpg) and CO2 output of 105 g/km. It can accelerate 0-100 km/h (62 mph) in 10.7 seconds, with top speed of 206 km/h (128 mph).
Other features include electric motor-based power steering, revised aerodynamics, low-rolling resistance 225/45R17 tyres, and electric actuation of the rear brakes.
The car was unveiled in Paris Motor Show.
Model year changes
During a model cycle changes are made to integrate new technologies and to keep the model competitive. These changes are referenced based on the model year (MY) of the car. In Australia, the B8 has undergone 2 revisions leading to three variants, the B8, B8 MY10 and B8 MY11.
The new facelifted A4 features redesigned LED headlamps and tail lights, front air dam with fog lamps, and closely set twin exhausts. Interior changes include a three-spoke steering wheel and a redesigned ignition key. Controls for air-conditioning, infotainment, and power windows gain chrome clasps. The A4 includes radio with eight speakers as standard, while MMI navigation system with voice dialogue is optional. A new "Drive Select System" allows drivers to choose comfort, dynamic, individual, or efficiency modes for fuel efficiency. Power output of the 1.8 TFSI engine is 170 BHP and 320 Nm of torque – up 10 BHP and 70 Nm from the previous versions. Electro-mechanical power steering is standard.
Biofuel land speed record
In 2009, Hohenester Sport announced its modified HS 650 Audi B7 A4 quattro had set a new world speed record of the fastest biogas-powered car of 364.6 km/h (226.6 mph) at the test track in Papenburg, Lower Saxony, driven by Jürgen Hohenester. The vehicle includes a 3.0 litre twin-turbo V6 engine, with electronically limited 700 PS (515 kW; 690 bhp) rating.