Audi A8 engines
Content
The Audi A8 is a large-size four-door executive sedan. The car is the flagship model of Audi. According to the internal classification, the car belongs to the luxury class. Under the hood of a car, you can find diesel, gasoline and hybrid power plants.
Short description Audi A8
The release of the executive sedan Audi A8 was launched in 1992. The car was based on the D2 platform and the Audi Space Frame aluminum monocoque. Thanks to this, it was possible to reduce the weight of the car, which gave a win over competitive models. The car is offered with a choice of front-wheel drive and all-wheel drive.
In November 2002, the second generation of the Audi A8 was introduced. The developers focused on improving the comfort of the sedan. The car boasts adaptive cruise control. To improve safety, a dynamic cornering lighting system is installed on the car.
The presentation of the third generation Audi A8 took place on December 1, 2009 in Miami. Three months later, the car appeared on the German domestic market. The external design of the car has not undergone significant changes. The car received a whole range of technical systems to improve driver comfort, the main ones being:
- integration of all electronics into a FlexRay network;
- broadband Internet access;
- smooth adjustment of the headlight range according to information from external cameras;
- lane keeping support;
- assistance with rebuilding;
- function of detecting pedestrians at dusk;
- recognition of speed limits;
- optional LED headlights;
- automatic emergency braking when a collision is imminent;
- high-precision dynamic steering;
- the presence of a parking assistant;
- gearbox using Shift-by-wire technology.
The debut of the fourth generation Audi A8 took place on July 11, 2017 in Barcelona. The car received the autopilot function. The basis of MLBevo was used as a platform. Externally, the car largely repeats the Audi Prologue concept car.
Overview of engines on various generations of cars
The Audi A8 uses a wide range of powertrains. More than half of the engines are gasoline engines. At the same time, diesel internal combustion engines and hybrids are very popular. All power units have high power and are flagship. You can get acquainted with the engines used on the Audi A8 in the table below.
Power units Audi A8
| Car model | Installed motors |
|---|---|
| A8 1994 | ACK AFB AKN AAHMore ALG AMX APR AQD AEW AKJ AKCC AQG ABZ AKG AUX AKB AQF OW |
| A8 1996 | ABZ AKG AUX AKB AQF OW |
| A8 restyling 1999 | AFB AZC AKN Ake ACK ALG ACF AMX APR AQD AUX AKB AQF OW |
| A8 2002 | ASN ASB BFL ASE BGK BFM BHT BSB BTE |
| A8 restyling 2005 | ASB BPK BFL BGK BFM BHT BSB BTE |
| A8 2nd restyling 2007 | ASB BVJ BDX BPK BFL BVN BGK BFM BHT BSB BTE |
| Audi A8 2009 | CMHA CLAB CDTA CMHA CREG CGWA XNUMX heaven CDSB EYEBROW CTNA |
| A8 restyling 2013 | CMHA CHYA CDTA CDTC CTBA CGWD CREA CTGA CETC EYEBROW CTNA |
| A8 2017 | CZSE DDVC EA897 EA825 |
Popular motors
Immediately after the presentation of the first generation Audi A8, the choice of powertrains was not very large. Therefore, the AAH six-cylinder gasoline engine initially became popular. Its power was not enough for a relatively heavy sedan, so the popularity shifted to the eight-cylinder ABZ engine. The top version had a twelve-cylinder AZC power unit and was popular with fans of high-speed traffic. The AFB diesel engine did not gain popularity and was replaced by more powerful and sought-after AKE and AKF power plants.
The release of the second generation led to the popularity of the BGK and BFM engines. In addition to gasoline power plants, the ASE diesel engine has also won a good reputation. A comfortable option turned out to be an Audi A8 with a CVT. It used an ASN gasoline engine.
From the third generation, the trend of environmental protection begins to be traced. Motors with a small volume of the working chamber are gaining popularity. At the same time, a 6.3-liter CEJA and CTNA engine is available for sports fans. In the fourth generation, hybrid Audi A8s with CZSE powertrains are becoming popular.
Which engine is better to choose Audi A8
When choosing a first generation car, it is recommended to pay attention to the Audi A8 with ACK engine. The motor has a cast iron cylinder block. The engine resource is more than 350 thousand km. The power unit is unpretentious to the quality of the poured gasoline, but is sensitive to lubricants.
BFM engines were equipped only with all-wheel drive Audi A8. This is the best engine on the second generation of cars. The internal combustion engine has an aluminum cylinder block. Despite this, the power unit does not suffer from a change in geometry or the appearance of scoring.
The uprated CGWD engine performs well. His problems are usually associated with increased oil fat. The motor has a huge margin of safety, which allows you to tune it over 550-600 horsepower. The timing drive is highly reliable. According to the assurances of the company's representatives, the timing chains are designed for the entire life of the engine, so they do not need to be replaced.
Of the new motors, the CZSE is the best. It is part of a hybrid power plant with a separate 48-volt network. The engine showed no design flaws or "childhood illnesses". The motor is demanding on fuel quality, but very economical.
For lovers of speed, the best option would be the Audi A8 with a twelve-cylinder power unit. Quite a few of these machines were produced, but most of them have been preserved in good condition due to the large resource of the engines used. So on sale you can find a completely normal first-generation car with an AZC engine or a second one with BHT, BSB or BTE engines. The best choice for sports driving would be a fresher car with a CEJA or CTNA under the hood.
Reliability of engines and their weaknesses
In first generation engines, for example, ACK, most of the problems are associated with advanced age. Motors have a large resource and good maintainability. The most common problems with early Audi A8 engines are:
- increased maslozher;
- electrical failure;
- antifreeze leak;
- instability of crankshaft speed;
- drop in compression.
Fourth generation engines have not yet shown weaknesses. So, for example, for CZSE, only potential problems can be calculated. Its intake manifold is integrated into the cylinder head, making it impossible to replace it separately. The third generation of motors, for example, CGWD, also does not have many problems. However, car owners often complain about corrugations burning, water pump leaking and catalyst crumbs getting into the working chamber, which leads to scoring on the surface of the cylinders.
