1981 BMW 745 vs. 2006 Infiniti Q45
To start off, 2006 Infiniti Q45 is newer by 25 year(s). Which means there will be less support and parts availability for 1981 BMW 745. In addition, the cost of maintenance, including insurance, on 1981 BMW 745 would be higher. At 4,490 cc (8 cylinders), 2006 Infiniti Q45 is equipped with a bigger engine. In terms of performance, 2006 Infiniti Q45 (340 HP @ 6400 RPM) has 88 more horse power than 1981 BMW 745. (252 HP @ 5200 RPM) In normal driving conditions, 2006 Infiniti Q45 should accelerate faster than 1981 BMW 745. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 745 weights approximately 276 kg more than 2006 Infiniti Q45.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2006 Infiniti Q45 (452 Nm @ 4000 RPM) has 72 more torque (in Nm) than 1981 BMW 745. (380 Nm @ 2200 RPM). This means 2006 Infiniti Q45 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 745.
Compare all specifications:
| 1981 BMW 745 | 2006 Infiniti Q45 | |
| Make | BMW | Infiniti |
| Model | 745 | Q45 |
| Year Released | 1981 | 2006 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3430 cc | 4490 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 252 HP | 340 HP |
| Engine RPM | 5200 RPM | 6400 RPM |
| Torque | 380 Nm | 452 Nm |
| Torque RPM | 2200 RPM | 4000 RPM |
| Engine Bore Size | 92 mm | 93 mm |
| Engine Stroke Size | 86 mm | 82.7 mm |
| Engine Compression Ratio | 8.0:1 | 9.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1596 kg | 1320 kg |
| Vehicle Length | 4870 mm | 5110 mm |
| Vehicle Width | 1810 mm | 1850 mm |
| Vehicle Height | 1440 mm | 1500 mm |
| Wheelbase Size | 2770 mm | 2880 mm |
| Fuel Tank Capacity | 100 L | 81 L |
