Audi A4 B9 vs Peugeot 508 W23

Audi A4

B9 · 2015 – 2024

The fifth-generation A4 (B9), on the longitudinal MLB Evo platform.

Peugeot 508

W23 · 2010 – 2018

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

First car

Second car

Pick this one if…

Audi A4

Pick the B9 for the 40 TDI’s 400 Nm and quattro — ideally a post-facelift car with Virtual Cockpit.

Best engine: The 40 TDI (190 hp diesel) or 40 TFSI (190 hp 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 40 TFSI · Petrol vs 1.6 THP 165 · Petrol

	Audi A4	Peugeot 508
Power	190 hp Winner	165 hp
Torque	320 Nm Winner	240 Nm
0–100 km/h	7,3 s Winner	8,5 s
Top speed	240 km/h Winner	220 km/h
Power-to-weight	129,3 hp/t Winner	111,5 hp/t
CO₂ emissions (WLTP)	137 g/km Winner	150 g/km
Consumption (WLTP)	6,0 L/100km Winner	6,5 L/100km

Dimensions & space

	Audi A4	Peugeot 508
Boot	480 L	545 L Winner
Boot (seats folded)	—	1.500 L
Wheelbase	2,82 m Winner	2,82 m
Length	4,73 m	4,79 m
Ground clearance	13,0 cm	—
Turning circle	11,6 m	11,2 m Winner
Towing capacity (braked)	1.700 kg Winner	1.600 kg

Powertrain & tech

	Audi A4	Peugeot 508
Platform	MLB Evo (longitudinal)	PF3
Drive	Front-wheel drive · All-wheel drive	Front-wheel drive
Engine family	EA888 2.0 TFSI · EA288 2.0 TDI · 40/45 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 A4

S tronic (DSG) mechatronics on early 2.0 TDI
AdBlue/SCR issues on EA288 diesels
MMI (MIB2) infotainment can reboot or freeze

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 A4

40 TFSI e plug-in hybrid does ~50 km electric
Virtual Cockpit available across all years — post-2019 facelift upgrades to MIB3 touchscreen
MLB Evo platform — lighter and stiffer than the B8

Peugeot 508

Roomy boot (especially SW)
Comfortable
Affordable used

Cons

Audi A4

40 TFSI e plug-in hybrid cuts boot space to 380 litres
Pre-facelift MIB2 infotainment has no touchscreen

Peugeot 508

1.6 THP carries timing-chain risk
Conventional styling

Driving experience

Audi A4

What defines the B9 is how quietly it gets on with the job. The cabin is hushed, the ride composed, and quattro ultra shuffles torque between the axles without ever letting on, giving a planted, almost understeer-free security. Steering is accurate but deliberately light and never asks much of you. Engines are the real story: the 2.0 TFSI is brisk and tractable, the 2.0 TDI the sensible long-distance choice, and the 3.0 TDI V6 pulls like a locomotive with the manners of a far larger car. The S tronic snaps through gears crisply; the tiptronic simply dissolves them. What you give up in steering feel you win back in effortless progress.

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.