Well, consider the cat officially out of the bag. Nearly five months after its debut at the 2014 Detroit Auto Show touting "at least 625 horsepower," the 2015 Chevrolet Corvette Z06 has now been SAE-certified to produce an impressive 650 hp.

For reference, the new Z06 is bested only by the following bits of exotica: the Ferrari LaFerrari, the McLaren P1, the Porsche 918 Spyder, the Ferrari F12 Berlinetta, the Lamborghini Aventador and the Ferrari FF. That's some mighty good company.

Complementing the 650 supercharged ponies is an equally impressive 650 pound-feet of torque. Lovely as that second figure is, we really need to break down where the power is available. According to Chevy, 457 pound-feet of torque is available at idle, while 96 percent of peak torque arrives by 2,800 rpm. Honestly, if the Z06 can't hit 60 in under three seconds, we'll be shocked. Talk about a whole lot to handle.

There are plenty of other interesting and supercar humbling metrics available below, in Chevy's official press release. You can also view the new track star's power curves and view a nice breakdown of where the Z06 stacks up against other ultra-high-performance competitors. Scroll down to have a look.
Show full PR text
2015 Corvette Z06 Rated at 650 Horsepower
Supercharged LT4 V-8 engine is the most powerful ever from Chevrolet

DETROIT – The all-new 2015 Corvette Z06 is the most powerful production car ever from General Motors and one of a few production cars available in the United States that delivers more than 600 horsepower.

The Z06's LT4 supercharged 6.2L V-8 engine is SAE-certified at 650 horsepower (485 kW) at 6,400 rpm and 650 lb-ft of torque (881 Nm) at 3,600 rpm.

"The LT4 Small Block sets a new benchmark for power and torque at GM," said Steve Kiefer, vice president, GM Powertrain Engineering. "The engine also puts the new Corvette Z06 on par with the most powerful supercars offered in America, while delivering performance with impeccable manners that make it suitable for daily driving."

Compared with other supercar engines, the LT4 is a veritable fountain of low-end torque, producing 457 lb-ft (619 Nm) just off idle and 625 lb-ft (847 Nm) by only 2,800 rpm. The V-12-powered Ferrari F12 Berlinetta, for example, produces about 28 percent less torque than the Z06, despite offering about 12 percent more horsepower – and its peak torque isn't achieved until 6,000 rpm. The LT4 maintains 90 percent of its peak torque, or 592 lb-ft (802 Nm), from 2,500 to 5,400 rpm.

The new LT4 engine eclipses the Porsche 911 Turbo S engine's peak power levels by 90 horsepower (67 kW) and 134 lb-ft of torque (182 Nm).

"Torque is the pulling power of an engine and the LT4's abundance of it at every rpm in the engine's speed range helps the 2015 Corvette Z06 accelerate quicker and respond nearly instantaneously," said Jordan Lee, chief engineer for Small Block engines. "It's the very definition of power on demand."

The new Z06 engine produces 40 percent more peak torque (180 lb-ft / 244 Nm) than the previous-generation's 7.0L LS7 engine – and 7.5 percent more than the supercharged 2013 Corvette ZR1's 604 lb-ft (819 Nm). At 3,200 rpm, the new LT4 surpasses the LS7 by 208 lb-ft of torque (252 Nm). On the horsepower side of the graph, the LT4's 650-hp rating is 29 percent greater than the LS7's 505 horsepower (376 kW), and 12 horses more than the ZR1's LS9 engine.

"The new LT4 engine builds on the design strengths of our previous supercharged engine and leverages the technologies introduced on the Corvette Stingray – direct injection, cylinder deactivation and continuously variable valve timing – to take Corvette performance to an all-new plateau," said Lee. "Our new, very compact supercharger also helps the engine make power more quickly, and perhaps more importantly, it helps produce more torque earlier in the rpm band."

"It's also worth mentioning that the LT4's supercar performance numbers are achieved with an engine that is nearly the same size as the very compact LT1 engine introduced in the 2014 Corvette Stingray," Lee said. "The power density of the LT4 makes it one of the smallest and lightest 650-hp engines in the industry."

LT4 details
The new LT4 engine is based on the same Gen 5 small block foundation as the Corvette Stingray's LT1 6.2L naturally aspirated engine, incorporating several unique features designed to support its higher output and the greater cylinder pressures created by forced induction, including:
• Rotocast A356T6 aluminum cylinder heads that are stronger and handle heat better than conventional aluminum heads
• Lightweight titanium intake valves
• Machined, forged powder metal steel connecting rods for reduced reciprocating mass
• High 10.0:1 compression ratio – for a forced-induction engine – enhances performance and efficiency and is enabled by direct injection
• Forged aluminum pistons with unique, stronger structure to ensure strength under high cylinder pressures
• Stainless steel exhaust manifolds and an aluminum balancer that are lighter than their LT1 counterparts
• Standard dry-sump oiling system with a dual-pressure-control oil pump.

A new 1.7L supercharger spins at up to 20,000 rpm – 5,000 rpm more than the supercharger on the Corvette ZR1's engine. The rotors are smaller in diameter, which contributes to their higher-rpm capability – and enables them to produce power-enhancing boost earlier in the rpm band. That boost is achieved more efficiently via a more direct discharge port that creates less turbulence, reducing heat and speeding airflow into the engine.

"The Small Block's cam-in-block design heritage has always enabled very high performance and responsiveness in a small, compact package – an attribute amplified by the performance of our new supercharger's design," said Lee.

The LT4 is assembled at the new Performance Build Center at GM's Bowling Green Assembly Plant and at GM's Tonawanda engine plant in New York. It is matched with a standard seven-speed manual transmission or an all-new, paddle-shift eight-speed automatic transmission built in Toledo, Ohio.

Designed to deliver shift responses on par with the world's best dual-clutch transmissions, it is the first automatic offered in a Z06. It also makes the Z06 one of the few cars this powerful to offer the choice of a conventional manual transmission or an eight-speed automatic.

The 2015 Corvette Z06 goes on sale in early 2015.

Founded in 1911 in Detroit, Chevrolet is now one of the world's largest car brands, doing business in more than 140 countries and selling more than 4.9 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature spirited performance, expressive design, and high quality. More information on Chevrolet models can be found at www.chevrolet.com.

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    • 1 Second Ago
      • 6 Months Ago
      This is the most exciting automobile in the world today, a beautiful beast.
        • 6 Months Ago
        LaFerrari, P1, 918, One:1 etc etc etc would like to have a word with you.
          Aaron N
          • 6 Months Ago
          Uh yes, it is about seeing or driving one. In order for it to be truly exciting, you HAVE to drive it or see it in person. Of all those listed, tylermars is correct. But hey, we should believe the person who failed under the name "mopar" and decided to login to his fran account because he wants everybody to know he has a woman's name.
        • 6 Months Ago
        @tylermars.design, the question wasn't even about driving or seeing one. Try again.
      • 6 Months Ago
      Impressive - this thing is going to be a split time monster. I want to see some 60 to 150 times. Z06 owners are going to have fun running down 911 turbos and 458s. Still not a fan of the yellow with all the black trim - how about black, a nice steel blue or that beautiful pearl red they are putting on new Cadis.
      Matt Mossberg
      • 6 Months Ago
      Sweet! Now we need the weight and the prices of the different packages. They are probably still testing areo but cannot wait until I see one in the showroom or on the street. It will be interesting how traction is handled with that. much power from a dig. While I don't know how or if they were able to make lighter parts so it offsets the weight of the supercharger, I sure hope they do. With the most downforce of any car gm ever tested (wonder what cars that includes besides the new z28) and higher power (but the ? of weight ) it should be a good/great successor to the zr1.
      • 6 Months Ago
      "Honestly, if the Z06 can't hit 60 in under three seconds, we'll be shocked." I won't be shocked. 650 lbft to the rear is too massive to have proper traction coupled with row-yourself-stick. My guess is roughly 3.1-3.5 (not far off from previous ZR1). However it can certainly hit 1/4 mile faster.
        • 6 Months Ago
        You know there's gonna be an eight speed flappy paddle gearbox available, right?
        • 6 Months Ago
        If Ferrari manages to get the power to the ground with the F12, I'd imagine GM could do the same with their trick eDiff, and launch control.
      • 6 Months Ago
      Not a car that really suits my taste, but daaaaaaamn! Seems I owe it to my machine-loving soul to experience this one...
      • 6 Months Ago
      The big cherry on the top is that Chevy has stated that this car will start under 100Gs. Mind blowing. I wonder if there will be any car under 500gs that will be able to hang with it around a track? One of the worlds fastest street legal cars that will cost the same as an M3, and still be useable/conformable on the road.
        • 6 Months Ago
        I don't see how since the ZR1 started at $112,000.
          • 6 Months Ago
          Juechter did say "If you could afford the previous gen Z06, then you can afford this one", so there's a good chance it'll be under $100k.
      • 6 Months Ago
      I'll take two! Black hardtop Matte white 'vert.
      • 6 Months Ago
      needs more cowbell!
      • 6 Months Ago
      • 6 Months Ago
      Did Ford certify the numbers for the GT500 or did they just test and relase on their own?
        • 6 Months Ago
        Not sure.
        • 6 Months Ago
        Yes, they did. https://media.ford.com/content/fordmedia/fna/us/en/news/2012/04/27/at-662-hp--2013-ford-shelby-gt500-certified-as-worlds-most-power.html
        • 6 Months Ago
        Pretty sure all power specs have to be SAE certified.
        • 6 Months Ago
        Ford estimated 650 and got official certification to 662hp iirc.
        Julio B
        • 6 Months Ago
        Just like the 200 mph statement, I don't think anybody has been able to get it to that speed other than the factory.
        • 6 Months Ago
        That engine was SAE certified at 662hp.
      • 6 Months Ago
      Now we're talking!
      Bernie Kressner
      • 6 Months Ago
      Unlike the Stingray, this Z06 probably won't get 30 mpg on the highway....(crickets)..... Oh, wait...does anyone care? (^_^)... -----------------
        • 6 Months Ago
        @Bernie Kressner
        LOL, true, but I would guess it would be the most fuel efficient 650 hp car on the market :-P
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