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The List: Best of proving grounds

Proving grounds are where automakers and enthusiasts alike go to push their vehicles to their mechanical limits. The Rubicon Trail, located in the Sierra Nevada, is the ultimate off-road test, while Germany's Nurburgring is a grueling 13 mile road and track course. Jessi and Patrick visit both iconic proving grounds in this "best of" compilation of The List. If you like what you see, stay tuned to watch the full episodes, or click here to go directly to our episode archive and pick out some of your own favorite moments of The List to revisit. The List #0004: Conquer the Rubicon Trail The List #0073: Drive the Nurburgring Have an RSS feed? Click here to add The List. Click here to subscribe to The List in iTunes. Click here to learn more about our hosts, Jessi and Patrick. BMW Jeep Off-Road Vehicles Racing Vehicles The List Videos Original Video

2015 Dinan M235i First Drive

The first rule you learn about playing hide-and-seek is to wait until the seeker is out of sight before you move on to your next position. That feeling comes back to us as we're sitting in the Dinan-tuned 2015 BMW M235i on the twisty stretch of Route 152 near Gilroy, CA. Construction restricts the road to one lane before opening up to five miles of uninterrupted switchbacks. A local tipped us off to pull over and wait for traffic to clear, guaranteeing an open road and no risk of law enforcement seeking us out. Our first turn behind the wheel of the Dinan M235i started just a few miles north at the tuner's engineering and development center, located in an unassuming office park south of San Jose. Dinan conversions are known for being simultaneously subtle and awesome; an enhancement of products that already stand out in their respective classes. Dinan obtains its R&D cars through consumer channels, unlike some tuners that get early access to BMW's engineering for their own development projects. The development process is "reverse engineering," as technical director Casper van der Schoot describes it. Some development cars also come to Dinan through the generosity of its owner fan base. Customers hand over personal vehicles in exchange for discounted products. An M2 is already on order, and the Dinan engineers are on the edge of their seats waiting to take it apart. The Dinan treatment of the M235i increases performance without reinventing the dynamically sound package. As with other Dinan cars, the treatment on the M235i increases performance without reinventing the dynamically sound package. Approved dealers can install the Dinan parts, as can "anyone with a modest amount of technical aptitude," according to van de Schoot. Dinan's approach is to extract more of the best aspects of BMW products before supplanting stock parts with its own. That's why the M235i, like all Dinan products, comes with the eponymous Dinantronics engine control unit that remaps and finds more power from the stock inline-six-cylinder engine. A bespoke carbon-fiber cold air intake and stainless steel free-flow exhaust system add at least 15 more horsepower. The most significant alterations in the M235i's engine bay are a Dinan-rebuilt turbocharger and larger intercooler, which help increase total output beyond 440 horsepower. At this point you might wonder if all this untapped capacity is at BMW's disposal from the start, why does it take Dinan to release it?

2015 BMW Alpina B6 xDrive Gran Coupe priced from $118,225* [w/poll]

If you're in the market for a high-performance BMW and you live in Europe, you've typically had two range of options at your disposal: you could go for one of BMW's own M models, or turn to Alpina. Though technically independent of BMW, Alpina is about as close to the manufacturer as a tuner can get, and many of its models are offered through BMW's own dealer network.
That's overseas, but in the North American market, BMW has typically taken a different approach, offering just one Alpina model - the B7 - to fill in for a lack of M7 performance sedan. That all changes, however, with the debut of the BMW Alpina B6 xDrive Gran Coupe.
Slotting in alongside the M6 Gran Coupe, the Alpina B6 xDrive Gran Coupe is marginally more expensive and slightly less powerful, but makes up for those relative (and negligible) shortcomings in spades. Both are based on the 6 Series Gran Coupe and both pack a 4.4-liter twin-turbo V8, but with key differences. Where the M6 produces 560 horsepower, the Alpina offers 'only' 540. But where the M6 channels 500 pound-feet of torque to the rear wheels through a seven-speed dual-clutch transmission, the Alpina drives 540 lb-ft to all four wheels through an eight-speed automatic.