babypuppi: [9] Bmw M6 0 60 Making Daily Gallery

INGO BARENSCHEE

The 2012 BMW M6 convertible is a puzzling machine. Two conundrums, for example, present themselves immediately upon use of the primary controls. The first is trivial: the presence of a narrow, three-pedal-style brake-pedal pad in a car with no clutch pedal. The second is of infinitely more import to an enthusiast, being that this is a new BMW with steering that weights up in turns and actually exhibits some kickback as a result of midcorner bumps.

Unlike regular 6ers, the M6 is equipped with hydraulic assist for the power steering. You might already know that the M6’s close sibling, the M5 sedan, has hydraulic steering, too. Both cars share a 4.4-liter twin-turbo V-8 that employs the M division’s trick manifold that evenly spaces out exhaust pulses. Both convert engine rpm to tire rotation through a seven-speed dual-clutch automatic. (We’ve been promised a six-speed manual for the U.S.-market M5; fitting that transmission to the M6 is “possible,” we’re told, but not confirmed.) Both have launch-control programs, fuel-saving engine stop-start systems, adjustable throttle and damper settings, and so on. One key area in which the two differ—vastly—is steering feel. The M6 has it, the M5 largely doesn’t. Another puzzle.

The head-scratching continues when you consider the M6’s brakes and suspension. In an upcoming comparison test, you’ll read about the M5’s weak brake bite and its ride quality, which suffers from excessive up-and-down motion. Perhaps the difference can be chalked up to the German roads we traversed in the M5 versus the South Carolina byways outside BMW’s Spartanburg assembly plant (it also acts as a port of entry for German-built models such as the M6). Or maybe the fact that the M6 was driven solo, without comparison-test rivals to chisel out its faults. Whatever the case, the M6 convertible’s brakes are sharp and its ride motions restrained.

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As with the rest of the new-gen 6-series lineup, the manatee-like lumpiness of the previous car has given way to muscular creasing and a sleeker profile. This cloth-roofed droptop is still heavy—4509 pounds, or 232 more than a Euro-spec M5—in part explaining a quarter-mile sprint 0.5 second behind the quickest we’ve recorded for the M5, but 12.4 seconds is still plenty quick. The M6 droptop achieves 60 mph from rest in 4.0 seconds.

There is little to confuse in the M6’s dynamics, though; it drives the way it does because it’s big and powerful. Get too aggressive with the front end, and the nose will attempt to plow. Goose the accelerator too hard, and you’ll see the stability-control light or tire smoke, possibly both. The M6’s heft and 193.0-inch length make it more of a grand tourer and less of a sports car, although this latest version manages transitions with much more grace than did its predecessor. It’s easy to achieve high speeds and reach the 0.92-g skidpad limit, but the M6 doesn’t pretend to be as razor-sharp as the M3. Another nod toward this car’s GT nature is its engine note, which is softer than we’d like, especially in a convertible. And there is no tantalizing off-throttle burble.

The M6 convertible improves on its predecessor in every way save sonic quality—the previous car’s wailing, naturally aspirated V-10 is a hard act to follow—which is easy to understand given that the old car debuted for 2006. But how did the M6 end up trumping its M5 cognate in such critical areas? We’re stumped, and we haven’t even driven the 2013 M6 coupe yet.

Specifications

VEHICLE TYPE: front-engine, rear-wheel-drive, 4-passenger, 2-door convertible

PRICE AS TESTED: $123,795 (base price: $116,995)

ENGINE TYPE: twin-turbocharged and intercooled DOHC 32-valve V-8, aluminum block and heads, direct fuel injection

Displacement: 268 cu in, 4395 cc
Power: 560 hp @ 7000 rpm
Torque: 500 lb-ft @ 1500 rpm

TRANSMISSION: 7-speed dual-clutch automatic with manual shifting mode

DIMENSIONS:
Wheelbase: 112.2 in
Length: 193.0 in
Width: 74.8 in Height: 53.9 in
Curb weight: 4509 lb

C/D TEST RESULTS:
Zero to 60 mph: 4.0 sec
Zero to 100 mph: 9.2 sec
Zero to 130 mph: 15.5 sec
Zero to 150 mph: 22.2 sec
Rolling start, 5-60 mph: 4.3 sec
Top gear, 30-50 mph: 2.3 sec
Top gear, 50-70 mph: 3.1 sec
Standing ¼-mile: 12.4 sec @ 117 mph
Top speed (governor limited): 155
Braking, 70-0 mph: 168 ft
Roadholding, 300-ft-dia skidpad: 0.92 g

FUEL ECONOMY:
EPA city/highway driving: 14/20 mpg
C/D observed: 14 mpg

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