Audi A6 C8 vs Peugeot 508 R83

Audi A6

C8 · 2018 – 2025

The fifth-generation A6 (C8), on MLB Evo.

Peugeot 508

R83 · 2018 – 2026

The second 508 (R83), a fastback on EMP2 with PHEV and PSE.

First car

Second car

Pick this one if…

Audi A6

Pick the C8 for the 55 TFSI e plug-in hybrid and quattro — ideally a car with the MIB3 software updates applied.

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

Read the full guide

Pick this one if…

Peugeot 508

Pick the R83 for the modern 508 with a sharp fastback design and strong engines.

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
Ground clearance	12,0 cm	—
Turning circle	12,2 m	11,2 m Winner
Towing capacity (braked)	2.000 kg Winner	1.600 kg

Powertrain & tech

	Audi A6	Peugeot 508
Platform	MLB Evo (longitudinal)	EMP2 (modular)
Drive	Front-wheel drive · All-wheel drive	Front-wheel drive · All-wheel drive
Engine family	EA888 2.0 TFSI · EA839 3.0 TFSI · EA288 2.0 TDI · 55 TFSI e PHEV	1.2 PureTech · 1.6 PureTech petrol · 1.5/2.0 BlueHDi diesel · Hybrid/PSE PHEV
Transmission	7-speed S tronic	EAT8 automatic
Fuel	Petrol	Petrol
Euro standard	Euro 6d-TEMP	Euro 6d
LEZ access	Unrestricted access (compliant under current legislation)	Unrestricted access (compliant under current legislation)

Reliability & watch-outs

Known issues

Audi A6

48V mild-hybrid (BSG): belt-starter-generator needs checking on early cars
MMI touch (MIB3): software bugs and reboots on early C8 cars
AdBlue/SCR on 2.0 TDI diesels with mainly short trips

Peugeot 508

1.2 PureTech: wet timing belt
1.5 BlueHDi: AdBlue and chain on early units
Infotainment software needs updates

Pros

Audi A6

Dual-screen MMI touch cockpit
55 TFSI e plug-in hybrid does ~50 km electric
3.0 TFSI (55) has 340 hp

Peugeot 508

Stylish fastback design
Strong 2.0 BlueHDi diesel
PHEV and PSE available

Cons

Audi A6

55 TFSI e plug-in hybrid cuts saloon boot space down to 360 litres
Gloss-black interior plastics and dual touchscreens show fingerprints easily

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.