>>Interestingly the official figures imply the 1.2TSI (105ps) is more economical than the ordinary 1.2s (60/70ps) as well as the 1.4 (85ps), although of course real life might be different. >>
Most likely because it won't be working quite as hard as the lower PS rated engines. A Golf, as mentioned, is no lightweight and the larger the engine usually the better return overall fuel consumption wise.
Even more interesting (?) is the fact that the three Ford 1.8 diesel units earlier in the decade (from 90 to 115bhp) were all listed as having the same fuel economy figures on Ford's advertising boards in the car showrooms.
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