1975 Reliant Kitten vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 29 year(s). Which means there will be less support and parts availability for 1975 Reliant Kitten. In addition, the cost of maintenance, including insurance, on 1975 Reliant Kitten would be higher. At 4,398 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (328 HP @ 6100 RPM) has 288 more horse power than 1975 Reliant Kitten. (40 HP @ 5500 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 1975 Reliant Kitten. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 645 weights approximately 1155 kg more than 1975 Reliant Kitten. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2004 BMW 645 (450 Nm @ 3600 RPM) has 387 more torque (in Nm) than 1975 Reliant Kitten. (63 Nm @ 3500 RPM). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1975 Reliant Kitten. 2004 BMW 645 has automatic transmission and 1975 Reliant Kitten has manual transmission. 1975 Reliant Kitten will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1975 Reliant Kitten | 2004 BMW 645 | |
| Make | Reliant | BMW |
| Model | Kitten | 645 |
| Year Released | 1975 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 848 cc | 4398 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 40 HP | 328 HP |
| Engine RPM | 5500 RPM | 6100 RPM |
| Torque | 63 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Bore Size | 62.5 mm | 92 mm |
| Engine Stroke Size | 69.1 mm | 82.7 mm |
| Engine Compression Ratio | 9.5:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 4 seats |
| Vehicle Weight | 535 kg | 1690 kg |
| Vehicle Length | 3330 mm | 4830 mm |
| Vehicle Width | 1430 mm | 1860 mm |
| Vehicle Height | 1400 mm | 1380 mm |
| Wheelbase Size | 2150 mm | 2830 mm |
| Fuel Tank Capacity | 27 L | 70 L |
