I just can't understand how a 78bhp van can cruise at 115mph and yet apparently be geared with the same final drive ratio as the Ultimate TT above and therefore have a theoretical top speed of 210mph! As you know, I am possessed of a 48bhp van which struggles to get to 65mph even when empty and runs on shorter gearing, giving a terminal velocity of 75mph at the end of the red line. I know weight and wind resistance comes into it took, as does your greater torque, but does your extra 30bhp really equal a very comfortable 50mph higher top speed?
Could be something to do with the onboard balast penalty that has been served on the Commer 
Ian the answer is above 
Is it? I'd question that.
I did a quick check on the VW website and the and the current VW Transporter with the 130bhp TDI engine (which obviously has nearly double the bhp and torque than Rick's normally aspirated version) is credited with a top speed (where the law permits) of 104mph.
Whilst I agree, Peter, that Rick's VW has a much torquier mill than the Commer, it does not explain the apparent cruising speed of 115mph. A high-top van all kitted out with heavy camper gear (i.e. beds, fridge, gas and water tanks, cooker, exterior awning and all the other parlava) and with just 78bhp, can someone please explain how it can go faster by a margin of 11mph higher than the new VW which has much higher bhp and torque, lighter weight and better areodynamics?
Maybe the answer is blindingly simple, I suggest that Rick's van is a foreign import and he's forgotten to change the speedo from kph to mph!

It's either that or he's giving us a slightly ambitious account of the performance capabilities of his van, which incidentally is a very well appointed camper indeed.
