Comparison Infiniti Q45 I 4.5 (278 Hp) & Pontiac Grand AM (H) 3.4 i V6 GT (177 Hp) & BMW 3 Series Touring (E46) 318i (118 Hp)
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| Brand: | Infiniti | Pontiac | BMW |
| Model: | Q45 | Grand AM | 3 Series |
| Generation: | Q45 I | Grand AM (H) | 3 Series Touring (E46) |
| Engine / modification: | 4.5 (278 Hp) | 3.4 i V6 GT (177 Hp) | 318i (118 Hp) |
| Production start: | 1989 year | 1998 year | 1999 year |
| Production end: | 1996 year | 2001 year | |
| Coupe type: | Sedan | Sedan | Combi |
| Num. of Doors: | 4 | 4 | 5 |
| Num. of seats: | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 11.7 l/100 km | 11.4 l/100 km | |
| Fuel consumption / economy - extra urban: | 8.1 l/100 km | 6.2 l/100 km | |
| Fuel consumption / economy - combined: | 12.4 l/100 km | 9.8 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 85 l | 57 l | 63 l |
| Power: | 278 hp | 177 hp | 118 hp |
| Max power in: | 6000 rpm. | 5200 rpm. | 5500 rpm. |
| Maximum speed: | 241 km/h | 190 km/h | 202 km/h |
| Acceleration from 0 to 100 km/h: | 10.9 sec | ||
| Torque: | 396 Nm @ 4000 rpm. | 279 Nm/4000 rpm. | 180 Nm @ 3900 rpm. |
| Model Engine: | M43B19 | ||
| Engine position: | Front, longitudinal | Front, transverse | Front, longitudinal |
| Engine displacement: | 4494 cm3 | 3350 cm3 | 1895 cm3 |
| Engine oil capacity: | 4 l | ||
| Coolant: | 6 l | ||
| Fuel System: | Multi-point injection | Multi-point injection | Multi-point injection |
| Position of cylinders: | V engine | V engine | Inline |
| Valvetrain: | DOHC | OHC | |
| Number of cylinders: | 8 | 6 | 4 |
| Number of valves per cylinder: | 4 | 2 | 2 |
| Compression ratio: | 10.2 | 9.5 | 9.7 |
| Piston Stroke: | 82.7 mm | 84 mm | 83.5 mm |
| Cylinder Bore: | 93 mm | 92 mm | 85 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 4 | 4 | - |
| Number of Gears (manual transmission): | 5 | ||
| Length: | 5075 mm | 4730 mm | 4478 mm |
| Width: | 1825 mm | 1790 mm | 1739 mm |
| Height: | 1435 mm | 1400 mm | 1409 mm |
| Wheelbase: | 2880 mm | 2718 mm | 2725 mm |
| Front track: | 1570 mm | 1500 mm | 1481 mm |
| Rear (Back) track: | 1570 mm | 1500 mm | 1488 mm |
| Minimum volume of Luggage (trunk): | 271 l | 415 l | 435 l |
| Maximum amount of Luggage (trunk): | 1345 l | ||
| Front suspension: | Coil spring | The depreciated rack | Wishbone |
| Rear suspension: | Helical spring | The depreciated rack | Helical spring |
| Max weight: | 1905 kg | ||
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Drum | Disc |
| Kerb Weight: | 1833 kg | 1365 kg | |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering | Hydraulic Steering |
| Tire size: | 215/65 R16 V | 215/60 R15 | 195/65 R15 |
| Wheel rims size: | R15 |