I throw in my tuppence worth.
Slating the 2.0i is a bit grim in my opinion. Many of us drive Z4s for different reasons. Not everyone is a power freak or wants additional grunt and fuel consumption of the 3.0i. And for those maybe upgrading from a Mazda MX5 or MG(T)F etc the 2.0i power plant in the Z4 is more than enough for some open top motoring fun.
Or, for those who mainly drive in town/city, the 3.0i might get you to 30mph a little quicker, but its not really much use in built up areas.
The 2.0i isn't a pointless engine. If that's the argument you might as well add that the 3.0i is pointless given that the S54 3.2 in the M has a lot more power....
Oh, and on the Applecross Forum meet in 2012, Malcolm managed 50mpg in his 2.0i, and did the weekend on 1 tank of fuel. I took me nearly 2 tanks of fuel. Put some of the difference down to driving, but you see my point.
Edit: and if anyone wants to know how quick a 2.0i is, just ask Woots. His 2.0i put a few 3.0i and Ms to shame a few years ago. Seriously
There's enough engine snobbery on the forum as it is, so lets not start bashing the 2.0i again
Sent from my iPhone using Tapatalk