Re: Ford Focus - New
The 115 offers greater output and comes with what's known as variable valve timing as to improve fuel economy. You'll have to check with what the engines are rated for, emission wise, and I'd check with insurance to see if there is an additional premium for the engine. Personally, I'd stick with the base 100 PS 1.6L for everyday driving and save the thousand pounds. With exchange the way it is, £1000 is roughly $2200 USD...that seems a LOT to pay for an extra 15 PS with variable valve timing. If anything I'd spend more and get the diesel if you have the means, otherwise, stick with the base unless you really need the added oomph.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!