The Saab 9-5 Sport Estate 1.9 TiD with a Polar 620 with an actual weight of 1680 kg is a match just suitable for most journeys but also with some limitations.
The motor preformance of the Saab is in general more than sufficient. But the weight of the Polar 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!
Flat roads
Towing Performance
195
163
Mountains
Risk of snaking
203
113
Weight ratio: 91% (102% of kerbweight)
1680 kg
1855 kg
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Saab 9-5 Sport Estate 1.9 TiD Polar 620
Actual Weights
Polar 620: 1680 kg.
Saab 9-5 Sport Estate 1.9 TiD: 1855 kg.
Noseweight: 90 kg.
Actual weight ratio: 91%.
Performance
The engine's performance is generally fairly good on flat roads (performance score to compare 195 points).
Speeds of 69 mph (111 km/h) to 75 mph (121 km/h) are often quite possible.
There is sufficient power at low engine speeds (score to compare 163 points).
Slightly higher revs (1900 rpm) may be necessary under normal conditions on flat roads.
Acceleration from 0-62 mph (0-100 km/h) is theoretically possible in 23 sec.
In the mountains the performance is generally good (score to compare 203 points).
No problems are to be expected on steep mountain roads. Hill starts are possible on steep slopes up to 15%, but do require some experience from the driver.
On motorway inclines higher revs (3100 rpm) are needed.
A speed of 59 mph (95 km/h) is usually possible on most motorway inclines.
Weight
The towing limit of the Saab 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.
Weight ratio between the laden caravan and the loaded car is 91%. 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 exist. 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 knowledge of and experience in driving a caravan it should be safe to drive. Proper and careful loading is essential! An electronic stability system in the car and / or on the caravan is recommended.
Recommended noseweight is 90 kg.
Safe speed up to 56 mph (90 km/h).
Stability and safety score to compare is 113 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 more than sufficient.
Proper and careful loading is still important!
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.