Audi A6 C8 vs Peugeot 508 W23

Audi A6

C8 · 2018 – 2025

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

Peugeot 508

W23 · 2010 – 2018

The first 508 (W23), an executive saloon/estate on PF3.

First car

Second car

Pick this one if…

Audi A6

Pick the C8 for the quiet, tech-rich A6 with the dual MMI touchscreen and the strong 40 TDI diesel — ideally a full-history example.

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

Read the full guide

Pick this one if…

Peugeot 508

Pick the W23 for an affordable, comfortable executive 508 with a roomy boot.

Best engine: The 2.0 HDi (diesel) or 1.6 THP (petrol) — post-2014 facelift.

Read the full guide

Performance

EA888 45 TFSI · Petrol vs 1.6 THP 165 · Petrol

	Audi A6	Peugeot 508
Power	245 hp Winner	165 hp
Torque	370 Nm Winner	240 Nm
0–100 km/h	6,0 s Winner	8,5 s
Top speed	250 km/h Winner	220 km/h
Power-to-weight	148,5 hp/t Winner	111,5 hp/t
CO₂ emissions (WLTP)	160 g/km	150 g/km Winner
Consumption (WLTP)	7,1 L/100km	6,5 L/100km Winner

Dimensions & space

	Audi A6	Peugeot 508
Boot	530 L	545 L Winner
Boot (seats folded)	—	1.500 L
Wheelbase	2,92 m Winner	2,82 m
Length	4,94 m	4,79 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)	PF3
Drive	Front-wheel drive · All-wheel drive	Front-wheel drive
Engine family	EA888 2.0 TFSI · EA839 3.0 TFSI · EA288 2.0 TDI · 55 TFSI e PHEV	1.6 VTi/THP petrol · 1.6/2.0/2.2 HDi diesel
Transmission	7-speed S tronic	6-speed manual
Fuel	Petrol	Petrol
Euro standard	Euro 6d-TEMP	Euro 5
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

1.6 THP: timing chain and tensioner
HDi: DPF/EGR and turbo at high mileage
2.2 HDi: bi-turbo needs checking

Pros

Audi A6

Dual-screen MMI cockpit
Quiet, refined ride
Strong mild-hybrid diesels

Peugeot 508

Roomy boot (especially SW)
Comfortable
Affordable used

Cons

Audi A6

Touchscreen-heavy controls
Pricey options

Peugeot 508

1.6 THP carries timing-chain risk
Conventional styling

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 W23 is the 508 that replaced the 407 with a more settled, comfortable feel. Built on the PF3 platform, it stays reasonably light for its size, so the front axle turns in cleanly and the long wheelbase keeps it planted and calm on the motorway. The conventional driving position is easy to live with, and most versions ride on a comfort-tuned rear that irons out broken tarmac. The 1.6 THP is eager, the 2.0 HDi pulls strongly and quietly, and the 6-speed automatic shifts smoothly when working correctly. It is a comfortable, easy saloon, not a sporty one.