Sport Coupe Comparison: War of the Sports Car Worlds

Scott Dukes
Sport Coupes

TECHTONICS | Eric Tingwall
These four sports cars embrace modern technology, but they also cling to traditions established in earlier eras. These principles are central to the unique character of each coupe, and their evolving execution continually raises the performance bar.

Chevrolet Corvette Z06 Carbon Limited Edition

THE TRADITION
A small-block V-8 with 4.4-inch bore spacing and a pushrod-operated valvetrain.

THE EXECUTION
Its origins trace back to 1955, but the LS7 uses materials and manufacturing techniques inspired by contemporary racing. The handbuilt engines use low-mass reciprocating parts like forged titanium connecting rods and titanium intake valves to allow for a 7000-rpm redline. Precision machining includes deck-plate boring, cylinder honing, and CNC-ported heads. A composite intake manifold and hydroformed steel exhaust headers keep weight down. At 7008 cubic centimeters, the LS7 boasts the largest displacement and highest power output of any normally aspirated small-block V-8 that Chevy has put into production. The thoroughly modern outcome is 505 hp and 470 lb-ft of torque.

Nissan GT-R

THE TRADITION
Since the Skyline GT-R's 1989 revival, an all-wheel-drive system worthy of a race car.

THE EXECUTION
To carry more weight over its hind quarters, the all-wheel-drive GT-R has a rear-mounted transaxle. When all four wheels have traction, the system sends 100 percent of the torque to the rear wheels. A computer continually analyzes tire slip, yaw rate, steering angle, and acceleration, among other signals, to manage when and how much torque is sent to the front wheels. A hydraulically controlled, multiplate clutch engages the second longitudinal driveshaft, allowing up to 50 percent of the torque to be directed to the front axle. An electronically controlled limited-slip differential sits between the rear wheels.

Porsche 911 Carrera S

THE TRADITION
A horizontally opposed six-cylinder mounted behind the rear axle.

THE EXECUTION
In the early days, the hallmark 911 layout translated to nasty snap oversteer if provoked. Over the years, Porsche has dialed in a more balanced and stable chassis with more even weight distribution, vastly improved suspension systems, rear tires wider than the fronts, and the safety net of stability control. Today, the 3.8-liter flat six in the Carrera S delivers more than 100 hp per liter with direct injection and variable valve timing and lift on the intake side. For 2009, 13.2 pounds were shaved from the engine's weight and it was switched from open-deck to closed-deck construction, stiffening the block and reducing friction.

Lotus Evora

THE TRADITION
As founder Colin Chapman said, "simplicate and add lightness."

THE EXECUTION
In the shadow of the one-ton Elise, a car like the Evora can never be simple enough or light enough. Yet at 3130 pounds, the Evora is the lightest car in this test. The core of the chassis is an extruded-aluminum spaceframe bolted to an aluminum front subframe. The rear subframe and rollover hoop are made from steel for a total chassis weight of 454 pounds. Composite body panels surrounding the passenger cell are bonded (rather than bolted) to the chassis with polyurethane adhesive for additional stiffening. The result is torsional rigidity claimed to be more than 2.6 times greater than that of the Elise.

NickTO
I also enjoyed the article. The only piece that irked me a bit was the GT-R Techtonics by Eric Tingwall.The "Execution" piece should be accurate, but it's not.There are thing that can slide as they are somewhat accurate: 100% of the torque to the rear wheels (in fact it's 98%, but that's nitpicking).The main egregious statements are:"Hydraulically controlled multiplate clutch". It's actually an Electro-Magnetic controlled center diff (GKN's EMCD).Also, "An electronically controlled LSD sits between the rear wheels". Also inaccurate, while there is a VCD traction system in ATTESA, the rear diff is a mechanically passive 1.5way LSD, a GKN Driveline SuperLSD if I'm not mistaken.. what's certain is it's not electronically controlled like the R34 V Spec was.
Z06Paul
QUOTE:"Shifting is another issue, as the gas and brake pedals are poorly spaced for quick blips down into second gear and the beefy shifter makes it easy to miss the change back into third. For this reason, it's best to stay in third the entire run. And that's just fine by the brawny V-8. Even with the granny shifting, the Vette manages the second fastest lap of the group. "Given enough time, I could probably get the Z06 to lap fastest, but the GT-R's computers make it easy to get great times right out of the box," Cammisa notes."Wow, maybe you should find some full-grown men to test the cars for you....
u118224
I enjoyed the article, although the Evora would not have been my choice for the British entrant. Maybe the Jag or Aston would have exceeded the price limit. If I were in the market, my first choice is the Z06 Carbon with the Porsche a close second (I'd take the Porsche over a regular Z06),the GTR third and the Evora fourth. Honestly, I'd be happy with any of them.

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