The BMW 320i with a Swift Challenger 560 with an actual weight of 1594 kg is a match just suitable for most journeys but also with some limitations.
The motor preformance of the BMW is in general very good. But the weight of the Swift with a normally distributed User Payload (200 kg in the caravan and 200 kg in the car including passengers), is heavy. Try to move luggage from the caravan to the car and drive not too fast. Remember to load your caravan correctly, insuring that the noseweight of the caravan is sufficient and the weight is distributed properly. But even so, a starting caravan driver is better off choosing a smaller and less heavy caravan!
Flat roads
Towing Performance
259
237
Mountains
Risk of snaking
317
87
Weight ratio: 90% (102% of kerbweight)
1594 kg
1770 kg
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BMW 320i Swift Challenger 560
Actual Weights
Swift Challenger 560: 1594 kg.
BMW 320i: 1770 kg.
Noseweight: 85 kg.
Actual weight ratio: 90%.
Performance
The engine's performance is generally very good on flat roads (performance score to compare 259 points).
Speeds of 79 mph (128 km/h) to 84 mph (136 km/h) are often quite possible.
There is more than enough power at low engine speeds (score to compare 237 points).
Higher revs (1800 rpm) are usually not necessary on flat roads, under most circumstances.
Acceleration from 0-62 mph (0-100 km/h) is theoretically possible in 14.4 sec.
In the mountains the performance is generally very good (score to compare 317 points).
No problems are to be expected on steep mountain roads. Hill starts are possible on steep slopes up to 24%.
On motorway inclines higher revs (3100 rpm) are needed.
A speed of 71 mph (115 km/h) is usually possible on most motorway inclines.
Weight
The towing limit of the BMW is sufficient (check this in your vehicle documents).
If you passed your driving test after 1 January 1997, you will need a B+E (or B96) driving license.
The caravan is too heavily loaded.
Weight ratio between the laden caravan and the loaded car is 90%. Common in the UK: the weight ratio between the laden caravan and the kerbweight of the car is 102%.
The risk of snaking at higher speeds, strong side winds and thoughtless driving is great. Even if the combination normally feels stable, the forces by deflection side to side are so great that it could be dangerous. Only if the driver has a lot of knowledge and experience in driving a caravan it should be safe to drive slowly. Proper and careful loading is essential! An electronic stability system in the car and / or on the caravan is definitely recommended.
Recommended noseweight is 85 kg.
Safe speed up to 50 mph (80 km/h).
Stability and safety score to compare is 87 points.
If the caravan starts to snake you should reduce your speed and slow down directly! Lift your feet off the accelerator and brake gradually. Hold the steering wheel into a fixed position.
Conclusion
Performance is very good.
Proper and careful loading is essential!
It's a fairly good match, only for experienced (caravan) drivers and with some limitations.
Influence of User Payload on stability
Weight distribution and noseweight are vital in obtaining a stable caravan.