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Mazda details diesel prototype at Daytona test

Diesel has without a doubt become the dominant fuel in the modern era of endurance racing. The 24 Hours of Le Mans has been won under diesel power for the past eight years running, as has every race in the FIA World Endurance Championship since its inauguration in 2012. Yet there will only be one diesel prototype entered in the top tier of the new Tudor United SportsCar Championship this year, and it belongs to Mazda.
The last Japanese manufacturer to win at Le Mans outright, Mazda has been gradually working its way back up the endurance racing ladder once again, following the example set by Audi with diesel power. Last year it campaigned a competition-spec Mazda6 Skyactiv-D in the GX class of the Grand-Am series, but rather than simply port over the existing racer into the new series, it's fielding a new prototype instead, just as it promised a couple of months ago. And now that prototype has hit the track for the first time, prompting Mazda to release its basic specs for the first time.
Tentatively referred to simply as the 2014 Mazda Prototype, the purpose-built racecar is testing this weekend in the Roar Before the 24, the official test session at Daytona that kicks off the racing season. It packs a 2.2-liter SkyActiv-D engine that's based heavily on the production version but tuned to produce 450 horsepower and 580 pound-feet of torque in race trim. Power is channeled through a six-speed sequential transmission from Xtrac, carbon brakes from AP and 18-inch racing slicks from Continental. With the Daytona-spec aero setup, it'll top out at around 186 miles per hour.

Fiat 124 Abarth Spider spied, may get Alfa 4C power

We've long been excited to see, hear, and drive the car that results from the in-process Fiat-Mazda partnership. The Italian brand has had access to the excellent 2016 Mazda MX-5 Miata on which to base its own roadster, and the fruits of that labor will soon ripen. Spied here is not only the ensuing Fiat 124, but a hotter Abarth tuned version of the spider. At least, that's what we're hoping. Our spy shooters indicated that the car seen here not only sounded more aggressive than 'standard' 124 mules seen previously, but that it also accelerated away from their long lenses with a smartness. The 124 Spider is already rumored to make use of the 1.4-liter turbo I4 that makes 160 horsepower in the Fiat 500 Abarth, and this version may have a still-more-powerful engine. Another tell about the added output are the quad tailpipes in place of the lesser car's set of two. There's no hard evidence to support exactly which engine might be under the 124's hood, however. It's possible that the 1.7-liter turbo from Alfa Romeo 4C could be in play – with its 237-hp output – as the 124 was originally going to wear an Alfa badge. If that were to happen, however, the Fiat would almost certainly get a dual-clutch transmission instead of the purer manual box. In any event, more details about the car will no doubt crop up closer to the expected reveal this fall. Related Video:

Chicago Auto Show page claims 2016 Mazda MX-5 Miata to produce 155 hp [UPDATE]

UPDATE: Mazda wasn't willing to confirm or deny the figures cited by the Chicago Auto Show, although we're betting the 155-horsepower figure is a bit on the low side. As for the CAS page, a Mazda spokesman told Autoblog that they "aren't sure where they got that number." The horsepower estimate has since been pulled down. Well, someone may have made a boo-boo. The Chicago Auto Show is currently hosting a page that claims the Mazda MX-5 will produce 155 horsepower, courtesy of a 2.0-liter, Skyactiv four-cylinder. If this is correct, it'd be the first time the MX-5's US power output had been revealed. The 155 hp figure would account for a 12-hp drop from that of the outgoing MX-5, though, a corresponding weight loss should still improve the power-to-weight ratio for the 2016 model. Now, the CAS page could simply be following previous reports, including one from Autoblog. As recently as October, it was being reported that the MX-5 would be powered by a 2.0-liter, Skyactiv four-cylinder, a version of which is producing 155 horsepower and 150 pound-feet of torque in the Mazda3. Naturally, we've reached out to Mazda for comment – or perhaps even confirmation – on the info from CAS, although we aren't expecting a reply until at least later this morning (darn time zones). Of course, as soon as we hear anything, we'll update this story. Related Video: