Join Date: Sep 2009
Location: Cornwall & Sussex
My Motorhome: Burstner Elegance
Thanked 342 Times in 322 Posts
Our last motorhome was a Fiat 2.3 130bhp which weighed 4,200kg fully laden and we towed a 950kg car. I suspect that this will be similar to the combined weight you are proposing and we had no problems. On long hills we would have to drop through the gears (it was manual) to sometimes 3rd but it was never a problem.