Audi A6 4.0 TDI vs Mercedes-Benz S 680

Audi A6 4.0 TDI

Sedan · Diesel · AWD

Mercedes-Benz S 680

Sedan · Diesel · FWD

Car A

Audi A6 4.0 TDI

A quick, long-range AWD V8 diesel aimed at premium buyers, pairing 4.4 s 0–100 km/h pace with an efficient 7 L/100 km. Seats five with a 530-liter trunk, making it ideal for road trips while being less compelling for city-first use.

5 seatsSedanDiesel5-star safety7 L/100kmAWD

Car B

Mercedes-Benz S 680

A luxury four-seater with immense V8 performance and long-distance ease, the Mercedes-Benz S 680 shines for premium travel and road trips. Its very high price, fuel use, four-seat layout, and FWD setup limit appeal for city use or larger families.

4 seatsSedanDiesel5-star safety612 hp

Why compared same body typesame powertrainstrong ranking match

Usage fit

Family 63 / 51

City 32 / 16

Budget / value 44 / 6

Road trip 69 / 66

Performance 39 / 49

Cargo 29 / 28

Practical 45 / 23

Premium 65 / 89

Winter 70 / 30

Scores out of 100. Blue = Audi A6 4.0 TDI · Orange = Mercedes-Benz S 680

Specs side-by-side

Spec Audi A6 4.0 TDI Mercedes-Benz S 680

Values are representative — confirm for your market and trim.

Pros & cons

Audi A6 4.0 TDI

AWD traction for winter and mixed-road confidence on long trips
800 Nm torque and 4.4 s 0–100 km/h for effortless overtakes
Efficient for its class at 7 L/100 km, reducing fuel stops
Five seats and a 530 L trunk suit growing families and luggage
Weak fit for city driving per signals; shines more on open roads
Not built for cargo-heavy use despite a generous trunk
Premium price around 75,000 may exceed some budgets
Only five seats; no third row for larger families

Mercedes-Benz S 680

Very rapid acceleration (0–100 km/h in 3.5 s) and 300 km/h top speed.
Four-seat layout tailored to luxury travel.
550 L trunk capacity suits long road trips.
Strong safety ranking in our data for long-distance confidence.
Very high purchase price (200,000).
High fuel consumption at 14 L/100 km combined.
Only four seats limits family flexibility.
FWD layout may not suit buyers expecting RWD/AWD.

Verdict

Pick Audi A6 4.0 TDI if…

Best fuel economy

Audi A6 4.0 TDI uses 7.0 L/100km vs 14.0 — a meaningful saving if you cover high mileage.

Pick Mercedes-Benz S 680 if…

More power

Mercedes-Benz S 680 puts out 612 hp vs 340 — meaningfully quicker and more confident on motorways.

Usage fit

Specs side-by-side

Pros & cons

Audi A6 4.0 TDI

Mercedes-Benz S 680

Verdict

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