Happy torque with BMW’s M di­vi­sion

Buckinghamshire Advertiser - - MOTORS -

THE ul­tra-high per­for­mance with ex­cep­tional fuel ef­fi­ciency char­ac­terises ev­ery car from BMW’s sporty M di­vi­sion is once more fused with all-roads, all-weath­ers ca­pa­bil­ity with the in­tro­duc­tion of the sec­ond gen­er­a­tion X5 M and X6 M.

Com­pared to the 2009 mod­els which they suc­ceed, they bring im­prove­ments of up to 10 per cent in power, torque and per­for­mance while low­er­ing fuel con­sump­tion and car­bon diox­ide emis­sions by more than 20 per cent.

Both mod­els are pow­ered by a new 4.4-litre M TwinPower Turbo V8 en­gine with two Twin­Scroll tur­bocharg­ers. With out­puts of 575hp and 750Nm, it is the most pow­er­ful en­gine ever de­vel­oped by BMW for four-wheel-drive ve­hi­cles. It is linked to a newly de­vel­oped eight-speed M Step­tronic au­to­matic trans­mis­sion now fea­tur­ing Driv­el­ogic.

The cars’ out­stand­ing driv­ing dy­nam­ics ben­e­fit from spe­cific tun­ing by BMW M, while their be­spoke in­te­rior and ex­te­rior de­signs blend sporti­ness, lux­ury and func­tion­al­ity.

The bare fig­ures for the new BMW 4.4-litre V8 en­gine in the X5 M and X6 M are im­pres­sive enough in them­selves, but they tell only half the story.

This new power unit de­vel­ops its max­i­mum 575 hp – four per cent more than the en­gine in the pre­vi­ous mod­els – from 6,000 to 6,500 rpm, while peak torque of 750 Nm (a gain of 10 per cent) is avail­able from 2,200 to 5,000 rpm. This com­bi­na­tion of high-revving ca­pa­bil­ity with lin­ear, rapid re­sponse is thanks to the en­gine’s in­no­va­tive M TwinPower Turbo tech­nolo­gies, which in­clude cross-bank ex­haust man­i­folds, two Twin­Scroll tur­bocharg­ers, di­rect fuel in­jec­tion work­ing at a pres­sure of up to 200 bar and VALVETRONIC vari­able valve con­trol.

Th­ese tech­nolo­gies, in com­bi­na­tion with the newly de­vel­oped eight-speed M Step­tronic trans­mis­sion with Driv­el­ogic, en­sure per­for­mance more than meets the ex­pec­ta­tions of a car from BMW M while at the same time demon­strat­ing ex­cep­tional fuel ef­fi­ciency.

The X5 M and X6 M ac­cel­er­ate to 62mph in a su­per­car-equalling 4.2 seconds, but in nor­mal road driv­ing they are ca­pa­ble of 25.4mpg, with CO2 emis­sions of 258g/km – re­duc­tions of more than 20 per cent com­pared with pre­vi­ous mod­els.

The cross-bank ex­haust man­i­fold sends two con­verged streams of ex­haust gas to the Twin­Scroll tur­bocharg­ers through four sep­a­rate ex­haust ducts.

The en­gine fea­tures an ex­tremely rigid closed-deck crank­case which per­mits the high fuel in­jec­tion pres­sures nec­es­sary for it to achieve its im­pres­sive power out­put.

The BMW X5 M and X6 M ar­rive in deal­er­ships on April 11, 2015, and will be priced at £90,170 and £93,070.

BMW X5 M BMW X6 M 575 575 750 750 4.2 4.2 155* 155* 25.4 258 25.4 258 * Elec­tron­i­cally limited

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