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BMW tests M Lap Timer App with M4 Coupe at Brands Hatch

The 2015 BMW M4 looks to include all the necessary ingredients to offer dynamite driving experience. It's an M car after all. But in today's constantly connected world, the experience of hurtling a car around a track isn't always enough.
We want data, and while there are some solid telemetry apps available for smartphones (notably Harry's GPS LapTimer), manufacturers have been a bit slower to develop their own dedicated mobile telemetry trackers for their performance cars. With the new M4, though, BMW is taking the plunge, allowing drivers to track their lap progress through a new app, creatively called the M Lap Timer.
To show off the program, BMW has recruited touring car racer Andy Priaulx to perform a fast lap in an M4 at the UK's Brands Hatch circuit. The accompanying video doesn't do much to show off the app in action. Rather, it give us a stylized look at the metrics as Priaulx hustles BMW's hottest 4 Series coupe around the circuit.

BMW 4 Series Convertible basks in the sun

The BMW 4 Series Convertible will show its non-camouflaged face sometime later this year, but our spies recently caught this nearly naked prototype out getting some sun. As you'll recall, the droptop 4 Series replaces the 3 Series Convertible in the BMW range, and if our recent stint behind the wheel of the new 435i Coupe is anything to go on, this topless 4er should be quite a fun runabout for sun-drenched motoring.
To no one's surprise, the 4 Series Convertible shares all of its design with the 4 Series coupe, save, of course, the obvious roofectomy. Beyond that, the topless 2+2 will use the same engines and transmissions as the coupe, meaning it should arrive in the US in both 428i and 435i guises, powered by a 2.0-liter turbocharged inline-four and 3.0-liter turbocharged inline-six, respectively. Both six-speed manual and eight-speed automatic transmissions will be available.
The car spied this time around has the full M Sport visual treatment, with the revised (and better-looking) front fascia, larger 19-inch wheels, and attractive Melbourne Red paint. Interestingly, it appears this prototype has the standard xenon headlamp setup, rather than the full-LED option that's also available.

This Alpina C1 is a rare bit of BMW 3 Series history

Over its five decades in the business, German tuner-turned-automaker Alpina has established a long history of taking great BMWs and making them just a bit tastier, more luxurious, and well... faster. Of course, they haven't always been the land rockets of modern day, however that's not to say they were exactly tame. Back in the early 1980s, this was one of the cars to have—an Alpina C1 2.3. Based on the original E21 BMW 3-series, the C1 2.3 bridged the performance gap between the standard BMW 323i and Alpina's hard-charging B6 2.8. It summoned up a heady 170 horsepower and disposed of the 60 mph sprint in just seven and a half seconds. Not shabby at all. 33 years later, this '83 Alpina C1 is back up for sale , and it's still quite the head-turner. RELATED: Check Out the Hard-Charging 2016 Alpina B6 xDrive A look back at the C1's contemporary relatives show just how wide Alpina's performance gap had been. Introduced in 1977, the BMW 323i offered up 141 horsepower courtesy of BMW's famed M20 straight-six engine, a big performance improvement over the E21's previous four-cylinders. The Alpina B6 2.8 3-series on the other hand, introduced in 1978, blew its doors off thanks to the bigger 2.8-liter straight-six plucked from the BMW 528i, offering up 200 horsepower. All that, in an early 3-series. With that in mind, a middle-of-the-pack car made sense, so Alpina treated the 323i's straight-six to some of the B6 2.8's goodies, minus the former's Bosch fuel-injection system. Bilstein shocks were part of the diet too, along with oversized disc brakes, sleek alloy wheels, as well as the tell-tale Alpina front splitter, rear spoiler, and racy side-stripes. RELATED: The BMW Isetta is Coming Back, But as an Electric Vehicle! Inside, Alpina added a dose of luxury as well. One could order their C1 2.3 with the gorgeous optional Recaro seats with Alpina stripes, as well as a bespoke leather steering wheel, gear knob, and speedometer. Top speed? About 130 mph. Compared to regular E21 BMW 3-series cars, these are quite rare. How rare is a point of debate, however. Production estimates range from as few as 35 to as many as 400, depending on the source. Regardless, you certainly don't see them everyday, and if this one fits your fancy... it lives in Philadelphia, Pennsylvania. Related Video: This article originally appeared on Boldride.com. Aftermarket BMW Auctions Coupe Classics eBay alpina