I towed my series 2A SWB on a trailer total 2.6 tonne (GTW 4.9 tonne) behind my old p38 Diesel and now behind the 4.0 v8 I recon the old diesel was only giving about 5 mpg more than the v8. The Diesel did struggle more with the weight, hills were a challenge even with a 5 speed. The V8 feels...