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Cosworth briefly crows that Aston Valkyrie's 6.5L V12 has record horsepower

It's only natural that Cosworth would want the world to know that it's building the world's most powerful naturally-aspirated engine for the Aston Martin Valkyrie and Valkyrie AMR Pro. The timing of when the world should know about it, that's at issue. Yesterday the English engine maker's official Twitter account posted a picture of the barely-there coupe and the line, "We're famous for breaking records and our latest engine, the Aston Martin Valkyrie 6.5-litre V12, will be the world's most powerful naturally aspirated road engine with 1,130bhp." Two tags accompanied the post, #Cosworth and #AstonMartinValkyrie. About 90 minutes later, the tweet disappeared. The likely issue is that Cosworth got ahead of Aston Martin's official confirmation of Valkyrie outputs, something we're more used to from patent offices and Chinese model makers. The question is what output is Cosworth really talking about, and which car. All of last year, however, various reports had the street-legal Valkyrie making 1,130 hp. A Road & Track report attributed "nearly 1,000 hp" coming from the NA V12, the remaining 130 from a kinetic energy recovery system working the front axle. Hence, we're not sure if Cosworth's talking about its own engine alone at 1,130 hp, or its engine with the KERS. But then there's this: At the launch of the Valkyrie AMR Pro during the Geneva Motor Show this year, Aston Martin said the track-only Valkyrie AMR Pro would enjoy "a combined power output of more than 1100 bhp — more than the Valkyrie road car and a figure than comfortably exceeds the magic 1:1 power-to-weight ratio." The truth's a mystery for now, which is just as Aston Martin would want it. If Cosworth's engine really does make 1,130 hp on its own, that would be monstrous, and it would mean the automaker's been playing a serious game of English understatement. Even if Cosworth included the hybrid help, however, an NA V12 with 1,000 ponies would take the crown. The only competition is the 6.5-liter V12 in the Ferrari 812 Superfast, and that's 211 horses adrift. The quad-digit figures expected from Mercedes-AMG Project One and McLaren Speedtail require turbochargers, as does the just-teased V8 going into the Shelby Tuatara. With the first of 150 Valkyrie road car deliveries scheduled for next year, we probably don't have that much longer to wait to find out. Related Video:

Aston Martin updates Vanquish, Rapide S for 2015 [w/videos]

For such a small company, Aston Martin certainly keeps busy. Having already previewed its new V12 Vantage S Roadster ahead of its Pebble Beach unveiling, the British marque recently confirmed the arrival of a new Lagonda super sedan. But now it's turning its attention to its two flagship production models with a series of upgrades. The enhancements to the 2015 Vanquish (both coupe and Volante convertible) and Rapide S sedan center around the inclusion of the new Touchtronic III eight-speed automatic gearbox that brings with it enhanced performance, efficiency and comfort. Along with reprogrammed Bosch electronics, the new transmission and updates net a 3-horsepower boost in Vanquish (bringing output up to 568 hp) and 2-hp boost in Rapide S to 552. Torque rises to 465 pound-feet in both, along with revised stability control and steering systems. Upgraded dampers on the Vanquish are 15-percent stiffer up front and 35-percent firmer in the rear, while the Rapide S gets larger front brakes. The result of this suite of minor updates results in a rather substantial performance boost. According to Aston, the upfittings cut a good half-second off the 0-60 sprint for both models: the Vanquish drops from 4.1 seconds to 3.6, and the Rapide S from 4.7 seconds to 4.2. Additional visual enhancements to differentiate the new models are limited to new wheels, paint options and interior trim, the details of which you can scope out in the press release and pair of videos below. DYNAMIC ENHANCEMENTS FOR ASTON MARTIN VANQUISH AND RAPIDE S - Acceleration, top speed, emissions and economy improve significantly - Debut of state-of-the-art eight-speed Touchtronic III automatic gearbox - New engine management system, enhanced trim and specification options 6 August 2014 - Aston Martin is today revealing details of a raft of important enhancements to two of the brand's most popular and successful sports cars: the Vanquish ultimate GT and Rapide S four-door, four-seat, sports car. With the arrival of 15 Model Year (15MY) cars in markets around the world over the next few months, the luxury British brand is offering not only considerably enhanced performance and much-improved fuel economy and emissions, but also an even more honed, precise and responsive driving experience.

One-off Aston Martin DB9 Spyder Zagato Centennial up for grabs

There's a long and proud history of Aston Martins coachbuilt by Zagato, and while we wouldn't call them commonplace, most of them were put in serial production, however limited. But not this one. This one-of-a-kind DB9 Spyder was handbuilt by Zagato (along with a similarly styled DBS coupe) to celebrate Aston's centenary. Rather than remain in the private collections of either company, though, it was built in England, fitted with its customer bodywork (over the course of a year) in Italy, showcased back in England and then again at Pebble Beach before being delivered to its owner, who has kept it in California ever since. But now he's putting it up for auction. Equipped with a 6.0-liter V12, carbon-ceramic brakes and of course that unique coachwork, the DB9 Spyder Centennial edition has been consigned to RM Sotheby's for its sale in Monterey this coming August, two years after it was first shown there. It's anticipated to fetch between $380,000 and $450,000, which would be about double what Aston charges for a new DB9 Volante, but strikes us as a pretty solid investment considering just how rare this particular Anglo-Italian bird really is. Of course the Aston Zagato isn't the only notable vehicle RM has in store for Pebble this year. It's also highlighting a 1968 Maserati Ghibli Spyder that's billed as the first of its kind ever made, a US-spec Ferrari Daytona prototype, an early Lamborghini Countach and a rare 1973 Nissan Skyline GT-R. In short, RM's Monterey auction is already shaping up to be a notable one, and we're still a few months out with new consignments being added all the time.