Audi A6 vs Peugeot 508

Audi A6

Audi’s executive saloon.

Peugeot 508

Peugeot’s executive fastback saloon.

First car

Second car

Pick this one if…

Audi A6

Pick the A6 for a tech-forward interior, a hushed ride and efficient engines in a premium executive sedan.

Best engine: The 40 TDI (diesel) or 45 TFSI (petrol).

Read the full guide

Pick this one if…

Peugeot 508

Pick the 508 for a stylish, comfortable executive fastback with strong diesels and PHEV options.

Best engine: The 1.6 PureTech (petrol) or 2.0 BlueHDi (diesel) — post-2023.

Read the full guide

Performance

EA888 45 TFSI · Petrol vs 1.6 PureTech 225 · Petrol

	Audi A6	Peugeot 508
Power	245 hp Winner	225 hp
Torque	370 Nm Winner	300 Nm
0–100 km/h	6,0 s Winner	7,3 s
Top speed	250 km/h	250 km/h
Power-to-weight	148,5 hp/t	158,5 hp/t Winner
CO₂ emissions (WLTP)	160 g/km	140 g/km Winner
Consumption (WLTP)	7,1 L/100km	6,0 L/100km Winner

Dimensions & space

	Audi A6	Peugeot 508
Boot	530 L Winner	487 L
Boot (seats folded)	—	1.537 L
Wheelbase	2,92 m Winner	2,79 m
Length	4,94 m	4,75 m
Width	1,89 m	1,86 m
Height	1,46 m	1,40 m
Seats	5	5

Powertrain & tech

	Audi A6	Peugeot 508
Platform	MLB Evo (longitudinal)	PF3 (W23) · EMP2 (R83)
Drive	Front-wheel drive · All-wheel drive	Front-wheel drive · All-wheel drive
Engine family	EA888 petrol · EA288 diesel · plug-in hybrid	1.2 PureTech · 1.6 THP/PureTech · 1.5/2.0 BlueHDi · Hybrid/PSE
Fuel	Petrol · Diesel · Plug-in hybrid	Petrol · Diesel · Plug-in hybrid
Transmission	7-speed S tronic (DSG)	6-speed manual · EAT6/EAT8 automatic
Euro standard	Euro 6d-TEMP (early) · Euro 6d (later)	Euro 5/6 (W23) · Euro 6/6d (R83)
LEZ access	Euro 6 diesel allowed in the LEZ (Brussels/Antwerp/Ghent)	Euro 6/6d petrol/diesel and PHEV allowed in the LEZ

Reliability & watch-outs

Known issues

Audi A6

S tronic (DSG) mechatronics on early 2.0 TDI
AdBlue/SCR issues on EA288 diesels
MMI touch (MIB3) infotainment can stutter

Peugeot 508

1.6 THP/PureTech (early): timing chain
1.5 BlueHDi: AdBlue and chain on early units
2.2 HDi (W23): bi-turbo needs checking

Pros

Audi A6

Tech-forward interior with dual MMI touchscreens
Efficient, quiet EA288 diesel
Composed ride with optional adaptive air suspension

Peugeot 508

Stylish fastback design
Comfortable and quiet
Strong diesels and PHEV options

Cons

Audi A6

Touchscreen-only controls (less tactile than buttons)
Firm ride on S line + big wheels

Peugeot 508

Boot smaller than classic saloons
Low driving position

Driving experience

Audi A6

Comfortable, quiet and genuinely refined. The A6 rides with excellent isolation, steers accurately with light weighting, and cruises with the calm composure expected of a large executive saloon. Front-drive versions are efficient; quattro adds traction and security. The 2.0 TFSI is smooth, the 3.0 TDI V6 is the long-distance workhorse, and the 55 TFSI e plug-in covers short trips on electric power. The S tronic is quick, the tiptronic smooth. It is a tech-heavy, comfort-first executive car that does long distances with little effort.

Peugeot 508

The R83 wears a four-door coupé suit but rides the EMP2 bones of a family saloon, and that mix defines it. It sits low and wide, so the front axle feels keen and the car tracks calmly through corners, while the long wheelbase keeps it planted on the motorway. The small i-Cockpit wheel and raised dials are the most extreme Peugeot has done and demand a real acclimatisation; once settled, the steering is quick and accurate and body roll stays well held. Most versions ride on a comfort-tuned rear that smothers broken tarmac, though big wheels and firmer GT/PSE damping add some fidget. The 2.0 BlueHDi pulls strongly and quietly, the PSE is properly rapid, and the EAT8 automatic shifts without drama. It is a composed, comfortable fastback, not a sports saloon.