Click above to view sketches of the upcoming RR4

After having maxed-out the Phantom range with sedan, coupe and convertible variants, Rolls-Royce has been hard at work preparing its second range. Known tentatively as the RR4 (following in succession after the three Phantoms), the new "baby Rolls" will be anything but, and is expected to be unveiled next March at the Geneva show.

Based on a heavily-modified version of the BMW 7-series, the RR4 will offer direct competition to the Bentley Continental. And not just the four-door Flying Spur, either. Although the RR4 will initially appear – in concept form – as a sedan, the platform is expected to spawn additional coupe and convertible body-styles just like its big brother and its targeted competitor. Although many details still remain big question marks for the luxury sedan – including whether it will bear the "suicide" rear doors of the Phantom and what engines (including potential diesel and hybrid powertrains) will appear underhood – the RR4 is anticipated to double the output of the stoic British marque from its production of 1000 Phantoms last year to 2000 once production gears up on the as-yet-unnamed baby Roller.

Related GalleryRolls Royce RR4 - spy shots

[Source: CAR magazine]