BMW 630i
BMWs Entry-Level 6 Series Might Just Be The Pick Of The Range. Andy Enright Reports
To some the worlds lightest six cylinder engine will figure in their buying decisions about as prominently as the worlds most durable suspension turrets or the most aerodynamic cup holder in automotive history. It just doesnt seem that significant, especially in a car as luxuriously stuffed as BMWs 630i. But hang on a minute. With less weight hanging out over the nose, there are all sorts of handling benefits.
This is
BMW, remember, alleged purveyors of The Ultimate Driving Machine.
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The 630i Coupe and Convertible feature a 3.0-litre Valvetronicengine with technology that does away with conventional throttle butterflies in favour of a complex electrically-powered valve lifting system. Constructed from an aluminium and magnesium composite, this engine sits tucked well back in the cars cavernous engine bay and gives the 630i excellent weight distribution. Less weight also equates to better performance, more agile handling and lower fuel consumption and emissions.
Despite the modest cubic capacity, this engine punches well above its weight, knocking out 258bhp at 6,600rpm. On the road this translates into a surprising amount of heft. The sprint to 60mph from rest will disappear in just 6.3 seconds in the Coupe and 6.
7 seconds in the Convertible. Specify the optional automatic gearboxes and youll add a couple of tenths to these sprint figures. All versions run into BMWs self-imposed electronic limiter at 155mph with plenty to spare yet the 630i can still manage a combined fuel economy figure of 29.4mpg in Coupe form and 28.
5 if you go for the drop top. Twelve per cent up on BMWs old 3.0-litre petrol engine itself no slouch when it came to fuel figures the Valvetronic unit offers the best of both worlds. The Valvetronic engine complies with the latest Euro IV emissions regulations and features the worlds first electric water pump to cool the engine block for increased efficiency.
Six-speed manual gearboxes are fitted as standard but customers will also be able to specify their car with either an automatic or BMWs racy Sequential Manual Gearbox. The 630i is tricky to distinguish from its 645Ci sibling. Drive one over a set of scales and the 130kg weight saving would become apparent but otherwise youd have to rely on the black rather than chromed vanes in the front grille, the round instead of oval tail pipes and, unless the buyer ticks the badge delete box on the order form, the 630i badge on the cars chunky rump.
"Star quality is a tricky thing to define but the 6 Series just has it"
Time was when entry-level BMWs didnt come with too many buttons to press, owners being confronted with a dazzling array of plastic switch blanks to remind them of their place in the hierarchy. Fortunately these days have long gone and the 630i features a whole host of standard equipment. Leather trim makes the team sheet as do a whole host of standard safety features such as Dynamic Stability Contol, Dynamic Traction Control and Dynamic Brake Control. If, at this stage, you feel your 630i is lacking its full quota of dynamism, you can even opt for Dynamic Drive.
Active Steering is also offered. Dynamic Driving Control is a function very similar to the Sport mode on M3 and M5 models. Press a button on the centre console and this sharpens up throttle reaction as well as generating a little more feel from the steering system. When allied to the SMG or Steptronic gearboxes, DDC also shifts gears at higher revs, switching ratios in just 150 milliseconds.
Whichever system you choose, youll be amazed at the sheer grip generated by the roadroller Bridgestone Potenza tyres. That said, the 6 Series feels just that little bit too big to be a truly effective cross-country tool. On sweeping A-roads, weve always found 6 Series models to be magnificent and the 630i should prove to be no different. According to BMWs figures, third gear is capable of reaching over 100mph and the engines gutsy 332lb/ft of torque should make it almost unnecessary to resort to stirring the box.
An option many customers will choose is BMWs Dynamic Drive. This automatically builds up counter forces on the cars anti-roll bars and as such, virtually eliminates any body roll when cornering. After trying a car with Dynamic Drive and another without it, its an option worth pursuing if you plan to enjoy serious lateral g-forces. Another interesting option
BMW offer is Active Steering, a system that debuted to mixed reaction on the latest 5 Series.
This dramatically varies the steering ratio according to speed. At low speeds, youll often need little more than a quarter of a turn on the wheel to effect a 90-degree turn. Its easy to be caught out when decelerating from a motorway into the tight car park of a service area by Active Steering but its probably something to which youll grow accustomed. Customer take-up of the option on 5 Series models has outstripped BMWs most optimistic estimates.
Theres also Adaptive Headlights which turn through corners, a Head-up Display which projects vital information onto a section of the windscreen and Active Cruise Control that uses radar to maintain a safe distance to the vehicle in front. Even with none of these options selected, the 6 Series is still a very nice place to do business. Core driving functions are located in or around the steering wheel and a simplified version of the iDrive system offers a still enormous amount of driver control with just a few nudges, taps and twists of the serrated metal mouse. The dashboard design is otherwise rather low key, the analogue dials being rather disappointingly small.
Still, its tough to be overly critical of what is one of the strongest models in BMWs entire line up. The 630i suddenly makes the rest of the Six Series range look a bit overblown. Although this could prove a headache for BMW, its great news for us.
FACTS AT A GLANCE
CAR: BMW 630i range
PRICE: £45,260 - £50,660 - on the road
INSURANCE GROUP: 19
CO2 EMISSIONS: 216g/km
PERFORMANCE: 0-60mph 6.3s/ 155mph
FUEL CONSUMPTION: (combined) 29.4mpg
STANDARD SAFETY FEATURES: twin front and side airbags, DTC traction control, DSC stability control
WILL IT FIT IN YOUR GARAGE?: length/width/height mm 4820/1855/1373
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