2007 Subaru Impreza 2.5i Sedan 4-door 2.5l on 2040-cars

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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.

Is the Subaru BRZ STI being teased really only a tS version?

Teaser images of a purported Subaru BRZ STI were uncovered last night and sent the internet into a collective state of hysterics. That's not hugely surprising, though, considering the reverence that the BRZ, along with its fraternal twins, the Scion FR-S and Toyota GT86, have garnered from the automotive media. The sole sticking point, really, has been its mere 200 horsepower. People have been chomping at the bit over a higher output version of the sublime rear driver.
Those same people may be in for a disappointment, though. See, the BRZ STI that was teased last night might not be a real STI. Instead, it's looking like it might be a BRZ tS. According to 7Tune.com, the timing of the photos posted on Subaru's website lined up with Subaru's 86 Festival at Fuji Speedway, where the Subaru BRZ tS debuted. Despite wearing STI badges, the tS isn't the full-tilt STI model we've been hoping for. Instead, you can think of the relationship between tS models and STI models as sort of like the difference between a BMW 3 Series M Sport and a BMW M3.
Certainly, the speccing of the tS supports that idea. The engine of the BRZ remains untouched in both tS models, which is one of the primary things we expect a full-bore STI to address. A number of interior and exterior styling items have been added, along with Bilstein suspension pieces and six-pot Brembo brakes. The tS sports two different trim levels, with the higher end using Recaro seats, black alloy wheels, and a carbon-fiber rear spoiler. The base tS features silver wheels, standard seats, and all the same suspension and brake upgrades. Adding fuel to the fire that these are not the true STI models is the limited production run - Subaru will only build 750 tS cars.

Hi-po Toyota GT86 to get KERS?

We happen to like the Toyota GT86 - and, it of course goes without saying that the same applies to the Subaru BRZ and Scion FR-S, as well - just the way it is. Yes, that includes the standard 2.0-liter four-cylinder boxer engine and its 200 horsepower at 7,000 rpm.
That said, a little extra power never hurt anybody, right?
The most obvious way to add some punch to the GT86 would be with a turbocharger, and that has indeed long been rumored for an STI version of the BRZ. Will Toyota follow suit? According to Top Gear, the answer is no. Says GT86 chief engineer Tetsuya Tada, "I think 300bhp with a turbo and 200g/km of CO2 would be tasteless in this day and age. And a turbo would mean the loss of the GT86's uniqueness." Perhaps a bit harsh, but there you go.