Audi A6 C8 vs Peugeot 408 P54

Audi A6

C8 · 2018 – 2025

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

Peugeot 408

P54 · 2022 – 2026

The 408 (P54), a fastback crossover on EMP2 with the electric e-408.

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 408

Pick the 408 for a striking fastback crossover with a modern interior and the electric e-408.

Best engine: The 1.2 Hybrid (136/145) or the e-408 for full electric.

Read the full guide

Performance

EA888 45 TFSI · Petrol vs 1.2 PureTech 130 · Petrol

	Audi A6	Peugeot 408
Power	245 hp Winner	130 hp
Torque	370 Nm Winner	230 Nm
0–100 km/h	6,0 s Winner	10,5 s
Top speed	250 km/h Winner	200 km/h
Power-to-weight	148,5 hp/t Winner	92,9 hp/t
CO₂ emissions (WLTP)	160 g/km	120 g/km Winner
Consumption (WLTP)	7,1 L/100km	5,5 L/100km Winner

Dimensions & space

	Audi A6	Peugeot 408
Boot	530 L	536 L Winner
Boot (seats folded)	—	1.611 L
Wheelbase	2,92 m Winner	2,79 m
Length	4,94 m	4,69 m
Ground clearance	12,0 cm	—
Turning circle	12,2 m	11,2 m Winner
Towing capacity (braked)	2.000 kg Winner	1.400 kg

Powertrain & tech

	Audi A6	Peugeot 408
Platform	MLB Evo (longitudinal)	EMP2 (modular)
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	1.2 PureTech · 1.2 Hybrid (48V) · 1.6 PHEV · e-408 (EV)
Transmission	7-speed S tronic	6-speed manual · e-DSC6
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 408

1.2 PureTech (early): wet timing belt
PHEV/EV: check battery and charger condition
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 408

Striking fastback design
Modern i-Cockpit interior
All-electric e-408

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 408

No diesel offered
Boot smaller than classic saloons

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 408

The P54 is a liftback with a crossover stance, and it drives with an easy, planted feel. Built on the EMP2 bones shared with the 308 III, it stays light for its size, so the front axle turns in cleanly and the raised body adds visibility without making the ride busy. The small i-Cockpit wheel and raised dials need a short acclimatisation, then the steering feels accurate and the car settles into an easy rhythm. The 1.2 Hybrid is eager, the e-408 delivers instant, near-silent torque, and the EAT8 automatic shifts smoothly. It is a comfortable, easy crossover-liftback, not a sporty one.