Verdict
A
Audi A8 — spec data and generation history.

Audi's flagship — aluminium-bodied luxury saloon to take on Mercedes S-Class and BMW 7 Series. D2 (1994–2002) introduced the ASF aluminium space frame. D3 (2002–2010), D4 (2010–2017), D5 (2018–Present). Petrol 3.0 / 4.0 / 6.0 W12; diesel 3.0 / 4.0 TDI; PHEV 60 TFSI e from 2020. S8 / RS6-related variants covered separately.
Era-to-era deltas
Click any generation for the full deep dive

4.2 V8 quattro — 290 bhp, 0-62 in 6.7s.

4.2 TDI quattro — 326 bhp, 0-62 in 5.9s.

4.0 TFSI biturbo quattro — 435 bhp, 0-62 in 4.5s.

60 TFSI e PHEV — 449 bhp, 0-62 in 4.9s.
Common faults reported on each generation — useful when shopping the used market.
Mercedes S-Class · BMW 7 Series · Lexus LS · Jaguar XJ