One of the quickest sports-utility vehicles – the Subaru Forester 2.5 XT – has just got faster thanks to a new 255 PS Prodrive Performance Pack.

It brings down the Forester’s 0-60 mph time from an already remarkable 6.0 to 5.5 seconds, with the 0-100 mph time slashed from 17.9 to 15.5 seconds.

Equally important is the boost to engine flexibility. Torque grows from a prodigious 236 lb.ft at 3,600 rpm to 272.8 lb.ft at 3,500 rpm. Meanwhile, maximum power is at 5,500 instead of 5,600 rpm for the 211 PS version.

The result is a cut in the 30-50 mph time in fourth gear from 5.8 to 5.1 seconds and the 50-70 mph time coming down from 4.8 to 4.3 seconds.

Higher up the speed range the 70-90 mph times are reduced from 5.4 to 4.9 seconds in fourth and from 7.7 to 7.1 seconds in fifth.

And while the Prodrive Performance Pack-equipped Forester has not been tested for top speed, the standard 2.5 XT’s 140 mph is bound to be significantly improved on.

Costing £1,600 including VAT and dealer fitting, the PPP is available from early June and carries Subaru’s full three year/60,000 warranty. It comprises a reprogrammed Electronic Control Unit (ECU) and modified exhaust system.