Comparison Audi A6 (4F,C6) 3.0 TDI V6 (225 Hp) quattro & BMW Z4 (E89, facelift 2013) 28i (245 Hp) sDrive Automatic & Audi A4 (B8 8K) 2.0 TDI (136 Hp)
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| Brand: | Audi | BMW | Audi |
| Model: | A6 | Z4 | A4 |
| Generation: | A6 (4F,C6) | Z4 (E89, facelift 2013) | A4 (B8 8K) |
| Engine / modification: | 3.0 TDI V6 (225 Hp) quattro | 28i (245 Hp) sDrive Automatic | 2.0 TDI (136 Hp) |
| Production start: | 2004 year | 2013 year | 2009 year |
| Production end: | 2006 year | 2016 year | 2011 year |
| Coupe type: | Sedan | Cabriolet | Sedan |
| Num. of Doors: | 4 | 2 | 4 |
| Num. of seats: | 5 | 2 | 5 |
| Fuel consumption / economy - urban: | 11.2-11.4 l/100 km | 9.4 l/100 km | 6.1 l/100 km |
| Fuel consumption / economy - extra urban: | 6.0-6.2 l/100 km | 5.3 l/100 km | 4 l/100 km |
| Fuel consumption / economy - combined: | 7.9-8.1 l/100 km | 6.8 l/100 km | 4.8 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.30 | 0.34 | 0.28 |
| Fuel tank volume: | 80 l | 55 l | 65 l |
| Emission standard: | Euro 4 | EURO VI | Euro 5 |
| CO2 emissions: | 212-218 g/km | 159 g/km | 124 g/km |
| Power: | 225 hp | 245 hp | 136 hp |
| Max power in: | 4000 rpm. | 5000-6500 rpm. | 4200 rpm. |
| Maximum speed: | 245 km/h | 250 km/h | 215 km/h |
| Acceleration from 0 to 100 km/h: | 7.1 sec | 5.5 sec | 9.5 sec |
| Torque: | 450 Nm @ 1400-3250 rpm. | 350 Nm @ 1250-4800 rpm. | 320 Nm @ 1750-2500 rpm. |
| Model Engine: | BMK | CAGB, CJCB | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2967 cm3 | 1997 cm3 | 1968 cm3 |
| Engine oil capacity: | 8.2 l | 5.75 l | 5.0 l |
| Coolant: | 12.0 l | 8.5 l | |
| Fuel System: | Diesel Commonrail | Direct injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Twin-power turbo | Turbo / Intercooler (Turbocharging / Intercooler) |
| Position of cylinders: | V engine | Inline | Inline |
| Valvetrain: | DOHC | DOHC | |
| Number of cylinders: | 6 | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 17 | 10 | 16.5 |
| Piston Stroke: | 91.4 mm | 90.1 mm | 95.5 mm |
| Cylinder Bore: | 83 mm | 84 mm | 81 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 | ||
| Number of Gears (manual transmission): | 6 | 6 | |
| Length: | 4916 mm | 4239 mm | 4703 mm |
| Width: | 1855 mm | 1790 mm | 1826 mm |
| Height: | 1459 mm | 1291 mm | 1436 mm |
| Wheelbase: | 2843 mm | 2496 mm | 2808 mm |
| Front track: | 1612 mm | 1511 mm | 1564 mm |
| Rear (Back) track: | 1618 mm | 1559 mm | 1551 mm |
| Ride height(clearance): | 130 mm | ||
| Minimum volume of Luggage (trunk): | 180 l | 480 l | |
| Maximum amount of Luggage (trunk): | 546 l | 310 l | 962 l |
| Front suspension: | Independent multi-link | Double wishbone | Independent multi-link |
| Rear suspension: | Independent on trapezoidal lever | Multi-link independent | Independent, spring multi-link with stabilizer |
| Max weight: | 2325 kg | 1750 kg | 2025 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs | Disc |
| Kerb Weight: | 1745 kg | 1420 kg | 1475 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering | |
| Max. roof load: | 100 kg | ||
| Permitted trailer load with brakes (8%): | 2100 kg | ||
| Minimum turning circle (turning diameter): | 11.9 m | 10.7 m | 11.4 m |
| Permitted trailer load with brakes (12%): | 1900 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 85 kg | ||
| Tire size: | 225/55 R16 | 225/45 R17 | 225/55 R16 |
| Wheel rims size: | 7.5J x 16 | 8J x 17 | 7J x R16 |