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Subaru WRX and STI meet at the dyno with interesting results

Road and Track recently put the 2015 Subaru WRX and the 2015 WRX STI through a battery of dyno tests to find out not only how much difference there is between their two engines, but what kind of differences there are. The WRX gets the company's new FA20 2.0-liter boxer four-cylinder engine with features like a twin-scroll turbocharger, direct injection and variable valve timing on its two cams. The WRX STI stands pat with the older EJ-Series motor, meaning a 2.5-liter boxer four-cylinder with port fuel injection and carryover turbo lag. Subaru pegs the $26,295 WRX at 268 horsepower, 258 pound-feet of torque and an "extremely conservative" 0-60 mile per hour time of 5.4 seconds. The $34,495 STI clocks in at 305 hp and 290 lb-ft with a 0-60 mph time of 5.1 seconds. Ok, fight.
R&T's dyno runs sussed power numbers at the wheel of 223 hp and 245 lb-ft for the WRX, 247 hp and 243 lb-ft for the STI, then went on to demonstrate in numbers what everyone knew: that the WRX consistently puts out more of its torque earlier than the STI and achieves full boost almost three seconds quicker. On the other hand, on the track, the STI was also shown to have a conservative official 0-60 mph time, stopping the timer at 4.8 seconds compared to the WRX's 5.2 seconds.
The mag says it has comprehensive results coming from its "complete battery of tests," but for now, you can scrutinize their dyno charts and let the battle continue about which one you'd rather put your money down for.

Subaru WRX S4 gets big power bump in Japan

A month after originally teasing it, Subaru is finally unveiling its WRX S4 model for Japan. It's a bit more than just a plush take on the sport sedan, because Subaru is fitting a more powerful version of the 2.0-liter, turbocharged boxer four-cylinder engine than we get on these shores.
The company says that S4 stands for "'Sports performance', 'Safety performance', 'Smart driving' and 'Sophisticated feel," and it certainly looks like this Rex ticks all of those boxes. The most surprising feature is the Japanese model's 2.0-liter turbo engine boasting 296 horsepower (221 kilowatts) and 295 pound-feet (400 Newton-meters) of torque in this application. That's quite a healthy upgrade over the 268 hp and 258 lb-ft that Americans get in the standard WRX, and it's even nipping at the heels of the 305 hp and 290 lb-ft from the STI with a 2.5-liter mill that we get over here.
While extra power is always welcome, enthusiasts might not be so thrilled that Subaru's Sport Lineartronic Continuously Variable Transmission is the sedan's only available gearbox. However, it offers a simulated eight-speed shifting mode when drivers notch the car into Sport# driving mode. Of course, the S4 also packs Subie's trademark all-wheel drive with Vehicle Dynamics Control and Active Torque Vectoring as standard.

Subaru recalling over 8,000 cars for Takata airbag inflators

We have one more automaker to chalk up recalling Takata airbag inflators. Subaru is now throwing its hat in the ring by repairing 8,557 vehicles nationwide for faulty front passenger inflators. According to the Defect Notice from the National Highway Traffic Safety Administration, the problem affects 3,151 examples of the Legacy, Outback and Baja from the 2003 and 2004 model years and 5,406 units of the Impreza, including the WRX and STI (pictured above), from the 2004 model year.
As we all know by now, it's possible for the inflators to explode during airbag deployment possibly affecting not only the bag's inflation but also potentially spraying metal shrapnel at occupants. All of the affected vehicles will receive new passenger side inflators at no charge to the owner.
Seven automakers in the US announced recalls for the problem in late June affecting an estimated 2.1 million vehicles. Unlike some of the companies, Subaru is repairing all of the affected models in the US, rather just in certain warm-weather states. According to company spokesperson Michael McHale to Autoblog the reason is that "it was simpler to get everybody in there and make sure it was done." The replacement inflators should be in by the end of July, he said. Scroll down to read the recall report from NHTSA or download the full defect notice as a PDF, here.