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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?

BMW celebrates 30 years of M5 with 600-hp super sedan

It's been 30 years since BMW rolled out the first M5, and while displacement and cylinder count may have fluctuated over those past three decades, output has only increased. The first-generation E28 M5 packed a 3.5-liter inline-six with 252 horsepower and 243 lb-ft of torque. The second-gen E34 model that followed added an extra 100 cc (and later 200 more) to produce 310 hp and 266 lb-ft. The E39 followed with a 4.9-liter V8 churning out 394 hp and 369 lb-ft, replaced by the award-winning 5.0-liter V10 in the E60 with its 500 hp and 380 lb-ft before BMW rolled out the latest model with a 4.4-liter V8, its twin turbos making up for the two dropped cylinders and 600 cc of displacement to produce 560 hp and 502 lb-ft of torque. But even that's being left in the dust by the new special edition you see here.
The 30th Anniversary Edition BMW M5 packs that same 4.4-liter twin-turbo V8, but cranks the output up to a nice, round 600 horsepower and a solid 516 lb-ft of torque to go with it. That makes it more powerful, not only than any M5 that's come before it, but also any of its rivals. The Jaguar XFR-S and Audi RS6 Avant (the latter only available as a wagon and not in North America) both lag behind this ultimate of Ultimate Driving Machines; only the Mercedes-Benz E63 AMG trumps it on torque (but not on power), with 531 lb-ft in stock form and 590 in the S-Model.
As a result, the 0-60 time drops from a quoted 4.2 seconds in the stock M5 to a scant 3.7 in the 30th Anniversary edition (just one tick behind that twistier E63 S). The special M5 also comes with the Competition Package as standard, as well as a dedicated control module for the Active M Differential, a special Frozen Dark Silver matte finish, 20-inch alloys and black chrome badges. Special badges abound inside as well, where you'll also find black leather and Alcantara upholstery and aluminum trim. There'll even be a dedicated one-day course offered to owners at The Thermal Club in Palm Springs, CA, to further sweeten the deal.

BMW i3 EV continues to shed camouflage

As BMW gets closer to introducing the production version of its plug-in i3, we keep seeing the hatchback being tested with lessening degrees of design-obscuring camouflage. Last we heard, BMW is expecting to have the i3 ready by the end of this year, and the swirly, blue camo does little to hide its basic design in these latest spy shots.
We get our first clear look at almost everything above the wavy beltline including the silver roof edges and matching mirror caps, and it can't hide the dip in the beltline behind the B-pillar - matching what we've already seen on the i3 Coupe Concept unveiled at the LA Auto Show last year. Another change we notice is the lower portion of camo removed from the front fascia allowing us to see the air opening and the black, vertical inserts leading up to the fog light bezels. Judging by the "Hybrid Test Vehicle" stickers on the side of this prototype, we can only assume that this is the optional range-extended model.