Choosing the correct battery for your Audi A8 I (D2) produced between 1994 and 2002 is essential for reliable vehicle operation, especially considering the technological and mechanical differences between the various engine versions. The Audi A8 I, as a flagship luxury sedan of its era, was offered with a range of powerful petrol and diesel engines, from the classic 2.8 V6 up to the impressive 6.0 W12, as well as several quattro all-wheel-drive variants. Selecting the right battery is not just about meeting the minimum requirements; it is also about ensuring optimal performance, longevity, and compatibility with your specific vehicle configuration.
For nearly all engine variants of the Audi A8 I (D2), the manufacturer did not utilize a Start-Stop system, which simplifies the choice somewhat, as it means you do not necessarily need the more advanced EFB or AGM batteries required by modern Start-Stop systems. However, you will notice that for higher-capacity engines, particularly those with quattro all-wheel-drive and diesel variants, AGM (Absorbent Glass Mat) batteries are not only compatible but sometimes preferable due to their enhanced durability and better cold-cranking performance. The table indicates that both AGM and traditional lead-acid batteries were used across many models, especially in engines like the 3.7, 4.2, 6.0 W12, and the diesels. In fact, the manufacturer could equip cars with either type, so it is highly recommended to check which battery is currently installed in your A8 and to use the same technology when replacing it.
When it comes to battery capacity, most petrol engines in the D2 generation, such as the 2.8, 3.7, and 4.2, require batteries in the range of 95 to 110 Ah (ampere-hours), with a minimum cold-cranking amperage (CCA) of around 800-920 A. Diesel engines, which are generally more demanding in terms of starting current due to higher compression ratios, also fall within this range, though always on the higher end of the spectrum. For example, the 2.5 TDI and 3.3 TDI quattro models both call for batteries with between 95 and 110 Ah and a CCA of 850 to 920 A. In the case of the earlier S8 quattro from 1996 to 1999, a slightly smaller battery (74-78 Ah, 680-780 A) is sufficient, reflecting the different requirements of that particular engine.
As for examples of compatible battery models, for the smaller capacity S8 quattro (1996-1999), suitable choices include the Bosch S40 08, Bosch S50 08, Exide EA770, and Varta E11. For the larger capacity engines and diesels, examples of fitting batteries include Bosch S50 15, Bosch S5A 13, Exide EB1100, Exide EK950, Halfords AGM 019, Lucas LF017, and Varta G14 or I1. It should be emphasized that these are just example models, not an exhaustive list, but they represent the typical specifications you should be looking for. Always ensure the chosen battery matches the original’s physical size, terminal layout, and technology (AGM or lead-acid), as well as its electrical parameters.
A particularly interesting aspect of the Audi A8 I is that it was one of the first large-scale production cars to feature an all-aluminum space frame, dubbed the Audi Space Frame (ASF). This construction made the vehicle lighter and more agile than its contemporaries, but also meant that battery placement and access could sometimes differ from typical steel-bodied cars. The battery is typically located in the trunk for better weight distribution, which is worth considering if you plan to replace it yourself.
Another point to note is that the luxury equipment in the Audi A8, such as advanced climate control, electric seats, premium sound systems, and numerous electronic modules, places a relatively high constant demand on the battery. This further underscores the importance of choosing a high-quality battery with sufficient reserve capacity and reliable cold-cranking performance, especially in colder climates.
In summary, selecting the right battery for your Audi A8 I (D2) involves checking the original battery type (AGM or conventional), ensuring the capacity and cold-cranking amperage meet or exceed the manufacturer's recommendations, and confirming physical compatibility. While examples like Bosch, Exide, Varta, Halfords, and Lucas represent reputable choices, always verify the exact model for your engine version. Replacing your battery with the right specification will help maintain the reliability and performance of your iconic Audi flagship for years to come.
Audi A8 in version I (D2) was produced in the years 1994 – 2002. Below we present the specifications of batteries suitable for specific engines.
Basic parameters of batteries suitable for Audi A8 (1994-2002):
| Layout | Terminal types | Base hold-down |
|---|---|---|
| 0 – positive on the right side | 1 | B13 |
Audi A8 I (D2) – petrol engines:
- S 8 quattro (1996-1999)
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S4 S40 08 | 74 Ah 680 A | 278x175x190 mm | More |
| Bosch S5 S50 08 | 77 Ah 780 A | 278x175x190 mm | More |
| Exide Excell EB740 | 74 Ah 680 A | 278x175x190 mm | More |
| Exide Premium EA770 | 77 Ah 760 A | 278x175x190 mm | More |
| Halfords Standard HCB 096 | 76 Ah 680 A | 278x175x190 mm | More |
| Lucas Premium LP096 | 75 Ah 680 A | 278x175x190 mm | More |
| Lucas Supreme LS096 | 78 Ah 780 A | 278x175x190 mm | More |
| Varta Blue Dynamic E11 | 74 Ah 680 A | 278x175x190 mm | More |
| Varta Silver Dynamic E44 | 77 Ah 780 A | 278x175x190 mm | More |
Audi A8 I (D2) – petrol engines:
- 2.8
- 2.8 quattro
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S4 S40 13 | 95 Ah 800 A | 353x175x190 mm | More |
| Bosch S5 S50 13 | 100 Ah 830 A | 353x175x190 mm | More |
| Exide Excell EB950 | 95 Ah 800 A | 353x175x190 mm | More |
| Exide Premium EA1000 | 100 Ah 900 A | 353x175x190 mm | More |
| Halfords Standard HCB 019 | 95 Ah 850 A | 353x175x190 mm | More |
| Lucas Premium LP019 | 95 Ah 800 A | 354x175x190 mm | More |
| Lucas Supreme LS019 | 100 Ah 850 A | 354x175x190 mm | More |
| Varta Blue Dynamic G3 | 95 Ah 800 A | 353x175x190 mm | More |
| Varta Silver Dynamic H3 | 100 Ah 830 A | 353x175x190 mm | More |
Audi A8 I (D2) – petrol engines:
- 3.7
- 3.7 quattro
- 4.2 quattro
- 6.0 W12 quattro
- S 8 quattro (1999-2002)
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S5 AGM S5A 13 | 95 Ah 850 A | 353x175x190 mm | More |
| Bosch S5 S50 15 | 110 Ah 920 A | 393x175x190 mm | More |
| Exide AGM EK950 | 95 Ah 850 A | 353x175x190 mm | More |
| Exide AGM EK960 | 96 Ah 850 A | 353x175x190 mm | More |
| Exide Excell EB1100 | 110 Ah 850 A | 392x175x190 mm | More |
| Halfords Advanced AGM 019 | 95 Ah 850 A | 353x175x190 mm | More |
| Lucas Fusion AGM LF017 | 95 Ah 850 A | 353x175x190 mm | More |
| Lucas Premium LP020 | 110 Ah 920 A | 393x175x190 mm | More |
| Varta Silver Dynamic AGM G14 | 95 Ah 850 A | 353x175x190 mm | More |
| Varta Silver Dynamic I1 | 110 Ah 920 A | 393x175x190 mm | More |
Audi A8 I (D2) – diesel engines:
- 2.5 TDI
- 2.5 TDI quattro
- 3.3 TDI quattro
| Model | Capacity and CCA | Dimensions (LxWxH) | Price |
|---|---|---|---|
| Bosch S5 AGM S5A 13 | 95 Ah 850 A | 353x175x190 mm | More |
| Bosch S5 S50 15 | 110 Ah 920 A | 393x175x190 mm | More |
| Exide AGM EK950 | 95 Ah 850 A | 353x175x190 mm | More |
| Exide AGM EK960 | 96 Ah 850 A | 353x175x190 mm | More |
| Exide Excell EB1100 | 110 Ah 850 A | 392x175x190 mm | More |
| Halfords Advanced AGM 019 | 95 Ah 850 A | 353x175x190 mm | More |
| Lucas Fusion AGM LF017 | 95 Ah 850 A | 353x175x190 mm | More |
| Lucas Premium LP020 | 110 Ah 920 A | 393x175x190 mm | More |
| Varta Silver Dynamic AGM G14 | 95 Ah 850 A | 353x175x190 mm | More |
| Varta Silver Dynamic I1 | 110 Ah 920 A | 393x175x190 mm | More |
If you’re still unsure which battery fits your Audi A8 , or if you want to help others in their selection, please send us a photo of your current battery in the comment section at the bottom of the page. You can also send the picture to contact@whatbattery.co.uk (we will place it in the comments to also help other users). Be sure to specify the car model, year, type, as well as the engine capacity and power. We’ll do our best to assist you!