Both the SE-R and SE-R Spec V utilizes an advanced QR25DE HO 2.5-liter DOHC 4-cylinder engine designed specifically for the SE-R. Along with the larger displacement (2.5 liters versus 2.0 liters for standard 2007 Sentra models), the entire top end of the engine has been reworked for use in the SE-R Spec V - including unique intake and exhaust manifold, higher compression ratio (10.5:1), a higher redline (6,800 rpm), and unique camshaft profile and unique pistons and connecting rods.

The revised SE-R Spec V engine is rated at 200 horsepower and 180 lb-ft of torque. The SE-R Spec V also includes a standard close-ratio 6-speed manual transmission, Anti-lock Braking System with Electronic Brake force Distribution (EBD), available Helical Limited Slip Differential, large 12.6" front disc brakes, rear disc brakes, sport suspension tuning and a rear trunk-mounted V-brace.

For use in the Sentra SE-R model, the engine is rated at 177 horsepower and 172 lb-ft of torque, and is mated to a specially modified version of Nissan's Xtronic CVT (Continuously Variable Transmission) with standard paddle shifters.

Both the SE-R and SE-R Spec V also feature unique full front and rear fascias, side sill extensions, rear spoiler, unique headlight and rear combination lights and standard front fog/driving lights. Also standard are 17-inch aluminum alloy wheels. Like every 2007 Sentra, the SE-R is built on Nissan's rigid new "C" platform that offers a longer wheelbase, more room and more interior flexibility than the previous Sentra design.

Inside the spacious Sentra cabin are a number of unique SE-R features such as sport bucket front seats with red stitching and an embroidered SE-R logo, unique seat fabrics, sport appearance two-gauge (G-meter and oil pressure) meter cluster, LCD gear indicator (Xtronic CVT only), aluminum pedal pads and a leather-appointed sport steering wheel. Spec V models also feature a leather-wrapped shifter knob and red front seat belts.

The new SE-R is also available with a wide range of available amenities, including Intelligent Key keyless entry system (available with CVT only), Sunroof and Audio Packages and satellite radio (XM or Sirius).

Highlights of the 2007 Nissan Sentra include:

Body
- Unique SE-R front and rear fascias, side sill extensions, rear spoiler, SE-R badge
- A long wheelbase of 105.7 inches, resulting in 97.7 cubic feet of passenger volume (an increase of more than 9.0 cubic feet over the previous generation Sentra)
- A wide overall width of 70.5 inches (similar to that of many mid-size sedans)


Platform and Powertrain
- All-new Nissan "C" platform
- Front engine/front-wheel drive
- All-new 16-valve QR25DE High Output 2.5-liter DOHC inline 4-cylinder engine
- SE-R Spec V rated at 200 horsepower @ 6,600 rpm and 180 lb-ft of torque @ 5,200 rpm resulting from extensive modifications to the top end of the engine, including:
   - Unique resin intake manifold and dual branch exhaust manifold
   - Revised piston crown shape
   - Iridium-tipped spark plugs
   - Revised cam-shaft profile
   - Reinforced connecting rods
   - An 8 counterweight crankshaft
- 10.5:1 compression ratio, 6,800 rpm redline (SE-R Spec V)
- SE-R rated at 177 horsepower @ 6,000 rpm and 172 lb-ft of torque @2,800 rpm
- Close-ratio 6-speed manual transmission standard on SE-R Spec V
- Specially modified Nissan Xtronic CVT (Continuously Variable Transmission) with paddle shifters standard on SE-R
- Available Helical Limited-Slip Differential on SE-R Spec V

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