Originally Posted by flyfisher
That’s brilliant, well done. Any idea on what non modified mpg is?

When I first bought Monty, other than the Mulfab front wishbone conversion, he was completely standard; on the factory manifolds, cams, cylinder head and ECU the 143hp Duratec recorded 39mph on a run. I've now increased power and torque by more than 25% but on the same run at the same mostly legal road speeds I'm seeing the exact same 39mpg. Obviously, if I use the extra performance the engine will naturally consume more fuel, but driven sensibly Monty's fuel consumption remains completely unchanged from a bone stock Duratec Plus 4.

Of course this also means the excellent touring range remains unchanged too, as I understand it a 2012 Morgan Plus 4 has a fuel tank capacity of 55 liters so approximately 12.1 UK gallons, this means theoretically Monty has a touring range of 472 miles. However, I note the fuel gauge shows empty when there's still 3 gallons in the tank and that's when I fill up, so that's 9 gallons consumed at 39mpg giving Monty a genuine and very practical touring range of 351 miles with another 3 gallons in reserve when I refill the tank.

If I'm able to maintain a genuine 70mpg average that's 5 hours behind the wheel, in reality even on the motorway it's a lot harder than you think to achieve a true 70 mph average without spending significant time at 80 mph plus. Also, on a touring holiday you'd want a couple of comfort breaks and an hour for lunch so those 9 gallons are going to give you a comfortable 8 hour day on the road.

Personally, I feel that's a big enough touring day in a trad chassis Morgan!

Last edited by Montegue; 16/07/26 08:32 AM.