I'm a bit confused. I thought the GDi engine was supposed to be cleaner than the preceding Duratec? The GDi is rated at 149g/km whereas the Duratec was rated at 189g/km.
But friends of mine with the Duratec engined cars regularly get 40+mpg. When you apply the conversion factor to get from mpg to g/km CO2, the Duratec at 40mpg shows it's producing only 169g/km (ie it's more efficient than rated) whereas the GDi at 35mpg gives 193g/km, ie much dirtier than rated.
So it looks like whoever did the ECU map for the Morgan Duratec did a bloody good job, and whoever did the map for the GDi should probably go and have a chat with them to find out what they did :-)
