2003 BMW X3 vs. 1976 BMW 633
To start off, 2003 BMW X3 is newer by 27 year(s). Which means there will be less support and parts availability for 1976 BMW 633. In addition, the cost of maintenance, including insurance, on 1976 BMW 633 would be higher. At 3,210 cc (6 cylinders), 1976 BMW 633 is equipped with a bigger engine. In terms of performance, 1976 BMW 633 (197 HP @ 5500 RPM) has 12 more horse power than 2003 BMW X3. (185 HP @ 6000 RPM) In normal driving conditions, 1976 BMW 633 should accelerate faster than 2003 BMW X3. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW X3 weights approximately 370 kg more than 1976 BMW 633.
Because 2003 BMW X3 is four wheel drive (4WD), it will have significant more traction and grip than 1976 BMW 633. In wet, icy, snow, or gravel driving conditions, 2003 BMW X3 will offer significantly more control. 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, 1976 BMW 633 (285 Nm @ 4250 RPM) has 40 more torque (in Nm) than 2003 BMW X3. (245 Nm @ 3500 RPM). This means 1976 BMW 633 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW X3. 2003 BMW X3 has automatic transmission and 1976 BMW 633 has manual transmission. 1976 BMW 633 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW X3 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW X3 | 1976 BMW 633 | |
| Make | BMW | BMW |
| Model | X3 | 633 |
| Year Released | 2003 | 1976 |
| Body Type | SUV | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 3210 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 185 HP | 197 HP |
| Engine RPM | 6000 RPM | 5500 RPM |
| Torque | 245 Nm | 285 Nm |
| Torque RPM | 3500 RPM | 4250 RPM |
| Engine Compression Ratio | 10.5:1 | 9.0:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1840 kg | 1470 kg |
| Vehicle Length | 4570 mm | 4760 mm |
| Vehicle Width | 1860 mm | 1760 mm |
| Vehicle Height | 1680 mm | 1390 mm |
| Wheelbase Size | 2800 mm | 2630 mm |
| Fuel Tank Capacity | 67 L | 70 L |
