larger in back than the 1st gen model's all-around 235/45R18s. The updated VQ35HR is more powerful ( at 6,800 rpm and at 4,800 rpm), more fuel efficient, and more responsive than the previous VQ35DE. The "HR" stands for "High Revolution" or "High Response". A dual-path intake (two air cleaners, throttle bodies, etc.) lowers intake tract restriction by 18 percent and new equal-length exhaust manifolds lead into mufflers that are 25 percent freer flowing. The intake is said to benefit from a ram-air effect adding three horsepower at 60 mph. Electrically actuated variable valve timing is new on the exhaust cams which broadens the torque curve. The new engine block maintains the same bore and stroke, but the connecting rods were lengthened and the block deck was raised by 8.4 mm to reduce piston side-loads. 80% of the internal components have been strengthened or redesigned to handle the increased 7,500 rpm red line, along with the use of larger crank bearings with main bearing caps reinforced by a rigid ladder-type main cap girdle. With an increase in compression ratio from 10.3:1 to 10.6:1 these changes add 26 more horsepower. Torque is down from the old DE engine (268 vs. 270). The engine now sits 15 mm lower in the chassis for a lower center of gravity. Although the horsepower rating increases only 8 hp compared to the latest version of the previous "DE" engine, the real horsepower difference was much greater due to Nissan adopting the 2006 SAE hp measurement guidelines for horsepower ratings in 2007. According to Consumer Reports an Infiniti G35 Journey sedan with a 5-speed Automatic transmission can reach in 5.4 seconds, and the in 13.8 seconds. According to the also newly revised EPA guidelines, fuel economy is estimated at in the city and on the highway. Fuel economy is virtually identical between generations, with the second generation earning a edge in highway driving (both measured using EPA 2008 guidelines). Second generation G35 performance: According to Motor Trend and Automobile Magazine, a previous model 2005 G35 6MT sedan reached 0- in 5.7 seconds and the 1/4-mile in 14.1 seconds. This gives the new 2nd gen G35 V36 sedan a solid 0.4 and 0.3 second performance advantage respectively. 5-speed automatics are on par with manual transmission cars from a performance perspective. In a 2008 Road & Track comparison test with the new 2008 Cadillac CTS a 5-speed automatic transmission