To combat vibrations inherent in large four-cylinder engines, the QR25 features a silent chain drive and compact balancer system that effectively negates vibrations without taking up too much space-a problem with previous balancer designs.

Backing the QR25 is a six-speed manual transmission (SE-R Spec V), five-speed manual transmission (SE-R) or a four-speed electronically controlled automatic transmission (SE-R). A helical limited-slip differential is standard on the six-speed equipped SE-R Spec V. This mechanical differential is torque sensitive and provides instantaneous locking for increased traction and performance.

SE-R Handling and Braking
Sentra SE-R's suspension has been tuned to provide a maximum amount of performance and ride comfort. There are two suspensions available, corresponding with model choices-the standard SE-R and the ultimate, track-tuned SE-R Spec V. All SE-Rs feature front independent MacPherson struts and Nissan's patented rear Multi-Link Beam(tm), with 2mm larger front and rear stabilizer bars. The SE-R runs performance-tuned front and rear shock absorbers and a front strut tower brace for additional stiffness and suspension. Completing the suspension upgrades are 16-inch alloy wheels with 195/55R16 tires.

The SE-R Spec V takes the SE-R's handling capabilities one step further. Front spring rates have been increased 15 percent and rear spring rate has been increased 16 percent and there is improved shock absorber tuning. High-performance 215/45ZR17 tires on special 17-inch wheels complete the suspension package and give Sentra a tough, sport-compact look.

Braking is provided by large four-wheel disc brakes. The front assembly is impressive, consisting of 11-inch rotors. It could be hard to upgrade from these specs.

SE-R Interior & Tunes
Sentra SE-R's interior is differentiated from the standard well-equipped Sentra with numerous performance and convenience enhancements designed by Nissan Design Europe (NDE), NDA and NTCNA-FH. An overhead storage console with map lamps, special seat cloth, titanium-faced gauges and a leather-wrapped steering wheel and gearshift knob give SE-R's interior a sporty, functional look.

Once again, the SE-R Spec V model takes the Sentra to new extremes. An all-metallic meter finish with orange illumination and a special leather-wrapped steering wheel add to the performance look of the special charcoal-colored interior with black and red accents. Skyline-style sport bucket seats ensure that the SE-R Spec V driver's backside stays planted on twisty mountain roads.