There’s a huge range of engines available for the Focus, but so far, we’ve only had the chance to try a handful of the mainstream motors. The first is the 148bhp 1.5-litre turbocharged petrol, and it’s a little cracker. It feels punchy and flexible at the bottom of the rev range, and it’s capable of sprightly pace when you work it harder. Granted, the throttle response could be a bit sharper, but the engine always stays impressively quiet and smooth. This engine is likely to be ignored by most petrol buyers, though, who will probably plump for one of the 1.0-litre, three-cylinder turbocharged petrols, available in outputs of 99bhp and 123bhp. We’ve tried the latter, and in fairness, that would seem to be a good decision. The engine delivers a staggering amount of pull and pace for such a diminutive unit, and it provides real flexibility as well as some genuine fizz. Refinement is also very impressive, with none of the off-beat buzz you normally associate with a three-cylinder. It’s also available with a six-speed automatic gearbox which is a little slow to slush through the gears, so we’d stick with the sweet-shifting six-speed manual. Diesel buyers need not look past the impressive 118bhp 1.5-litre diesel. It delivers good flexibility and a progressive power delivery, and it’s smooth and quiet to boot. Of all its attributes, though, it’s this engine’s low running costs that’ll seal the deal for most people. Hot-hatch fans will love the Focus ST. Its turbocharged petrol engine is super-quick to respond from just 2,000rpm and is really strong at the top of the rev range, making this a very quick car. The trouble is, it's almost too keen, struggling to put its power down even in the dry. And, you don’t even need to unfurl the full power for the front wheels to tug at the steering or dive down any changes in camber. The same happens in the diesel version of the ST, and although it delivers vicious pull in the mid-range, the tail-off in performance towards the top of the rev range isn't really what you want in a true-blue hot hatch.