The new 2015 Ford Focus ST made its global debut at the Goodwood Festival of Speed today.

For the first time, the Focus ST will be available with a diesel engine, as well as a fire-spitting turbocharged petrol unit.

The diesel 2.0-litre TDCi diesel develops 185PS at 3,500rpm, with peak torque of 400Nm available from 2,000-2,750rpm.  It can accelerate from 0-62mph in 8.1 seconds and continue until its 135mph top speed.

However, its prodigious torque reserves allow for impressive in-gear acceleration, with 50-75mph in 6th gear taken care of in 9.7 seconds.

The diesel Focus ST is likely to be of interest to those with a little more environmental conscience, and they’ll be pleased to learn of the car’s 64.2mpg and 114 g/km CO2 figures.

The full-fat experience, however, arrives in the petrol Focus ST.  Powered by a 250PS 2.0-litre EcoBoost turbocharged four-cylinder unit, the new Focus ST completes the 0-62mph sprint in just 6.5 seconds and keeps on pulling until 154mph.

The turbocharged delivery makes the most of its not inconsiderable 360Nm of torque, on offer from 2,000-4,500rpm, while economy of 41.5mpg and CO2 emissions of 158 g/km are hardly figures to be ashamed of.

Both versions are mated to a six-speed manual gearbox with ratios chosen to suit each engine.

Keeping all that power in check is the job of the new sports suspension, with new front springs, sportier dampers, model-specific anti-roll bars, recalibrated electronic power steering and revised electronic vehicle control system.

Ford say these changes deliver quicker steering response, improved turn-in, and better balance.

A new Electronic Transitional Stability function of the ESP system helps maintain control during rapid changes of direction and speed, while new engine mounts and specially-developed 19-inch Michelin tyres round out the changes.

From the outside, the new Focus ST has a lower and wider stance and more aggressive look overall than the out-going model.  The bonnet is more sculpted, the headlights are slimmer and more aggressive, and the front fog lights are now rectangular.

New body-coloured side skirts and rear diffuser elements around the central exhausts, rear roof spoiler, black light bezels and a new design of optional 19-inch alloy wheel are the stand-out exterior changes.

There’s also a new colour – Stealth Grey – designed specially for the ST, while Deep Impact Blue joins the existing Tangerine Scream, Frozen White, Panther Black and Race Red.

Inside, three additional gauges – turbo boost pressure, oil temperature and oil pressure – are mounted atop the centre console.  There’s a new flat-bottomed steering wheel, satin chrome gear lever, ST pedals, satin chrome door grab handles, illuminated aluminium scuff plates, and Recaro seats.

Three grades will be available, kicking off with ST1 with grey fabric, while ST2 adds partial leather with contrast panels.  ST3 models are full black leather.

Ford’s Sync 2 connectivity system drives an 8-inch colour touch-screen, while adaptive front lighting with bi-xenon headlights features for the first time on the ST.  Cross Traffic Alert, Active City Stop and Lane Keeping Aid are also available.

The new Focus ST will be available to order in the autumn of 2014, with first deliveries expected in early 2015.  Prices have yet to be announced.