Comparison Mazda Roadster (NB) 1.8 i (146 Hp) & Opel Astra G Cabrio 2.2 Ecotec 16V (147 Hp) & Audi A4 (B8 8K, facelift 2011) 2.0 TDI (177 Hp)
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| Brand: | Mazda | Opel | Audi |
| Model: | Roadster | Astra | A4 |
| Generation: | Roadster (NB) | Astra G Cabrio | A4 (B8 8K, facelift 2011) |
| Engine / modification: | 1.8 i (146 Hp) | 2.2 Ecotec 16V (147 Hp) | 2.0 TDI (177 Hp) |
| Production start: | 1998 year | 2001 year | 2011 year |
| Production end: | 2005 year | 2005 year | 2015 year |
| Coupe type: | Roadster | Cabriolet | Sedan |
| Num. of Doors: | 2 | 2 | 4 |
| Num. of seats: | 2 | 4 | 5 |
| Fuel consumption / economy - urban: | 11.8 l/100 km | 5.5 l/100 km | |
| Fuel consumption / economy - extra urban: | 6.1 l/100 km | 4.1 l/100 km | |
| Fuel consumption / economy - combined: | 8.2 l/100 km | 4.6 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.30 | 0.28 | |
| Fuel tank volume: | 48 l | 52 l | 63 l |
| Emission standard: | Euro 4 | Euro 5 | |
| CO2 emissions: | 197 g/km | 120 g/km | |
| Power: | 146 hp | 147 hp | 177 hp |
| Max power in: | 7000 rpm. | 5800 rpm. | 4200 rpm. |
| Maximum speed: | 216 km/h | 230 km/h | |
| Acceleration from 0 to 100 km/h: | 9.5 sec | 8.2 sec | |
| Torque: | 168 Nm @ 5000 rpm. | 203 Nm @ 4000 rpm. | 380 Nm @ 1750-2500 rpm. |
| Model Engine: | Z22SE | CGLC, CMGB | |
| Engine position: | Front, longitudinal | Front, transverse | Front, longitudinal |
| Engine displacement: | 1840 cm3 | 2198 cm3 | 1968 cm3 |
| Engine oil capacity: | 5 l | 5.0 l | |
| Coolant: | 6.8 l | ||
| Fuel System: | Multi-point injection | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | ||
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | DOHC | DOHC | DOHC |
| Number of cylinders: | 4 | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 10 | 10 | 16.5 |
| Piston Stroke: | 85 mm | 94.6 mm | 95.5 mm |
| Cylinder Bore: | 83 mm | 86 mm | 81 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | Front wheel drive |
| Number of Gears (manual transmission): | 5 | 5 | 6 |
| Length: | 3955 mm | 4267 mm | 4701 mm |
| Width: | 1680 mm | 1709 mm | 1826 mm |
| Width including mirrors: | 1989 mm | 2040 mm | |
| Height: | 1235 mm | 1390 mm | 1427 mm |
| Wheelbase: | 2265 mm | 2606 mm | 2808 mm |
| Front track: | 1405 mm | 1474 mm | 1564 mm |
| Rear (Back) track: | 1430 mm | 1462 mm | 1551 mm |
| Front overhang: | 812 mm | 862 mm | |
| Rear overhang: | 849 mm | 1031 mm | |
| Minimum volume of Luggage (trunk): | 330 l | 480 l | |
| Maximum amount of Luggage (trunk): | 962 l | ||
| Front suspension: | Independent, Spring McPherson, with stabilizer | Multi-link suspension | |
| Rear suspension: | Semi-independent, spring | Independent on trapezoidal lever | |
| Max weight: | 1765 kg | 2030 kg | |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Disc | Disc |
| Kerb Weight: | 1010 kg | 1318 kg | 1480 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | Electric Steering | |
| Max. roof load: | 90 kg | ||
| Permitted trailer load with brakes (8%): | 1800 kg | ||
| Minimum turning circle (turning diameter): | 11 m | 11.5 m | |
| Permitted trailer load with brakes (12%): | 1600 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 80 kg | ||
| Tire size: | 185/60 R14 | 215/40 R17 | 225/55 R16 |
| Wheel rims size: | R14 | 7.5J x 17 | 7.5J x 16 |