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Porsche four-cylinder details emerge

 Porsche four-cylinder details emerge
2012 Porsche Boxster spy photos, Nurburgring, Germany 23.04.2010 / Copyright: SB-Medien

Turbocharged variant could offer 360 hp

New details are starting to emerge about Porsche's four-cylinder engine, which is slated to be launched in an entry-level roadster.

In an interview with Autocar, Wolfgang Durheimer - the outgoing head of research and development - confirmed the engine is under development and could be used in the 2012 Boxster and Cayman. More interestingly, he went on to say it "could be applied, if necessary, to the 911." While this sounds like blasphemy, he added "Our decision is, on the 911 side, we'll stay with the flat [six]. But there are opportunities for the future."

Expected to displace 2.5-liters, the four-cylinder engine will reportedly be unique to Porsche and available in turbocharged guise. While specifications are still pending, the latter variant could produce upwards of 360 hp (268 kW / 365 PS).

In similar news today BMW has announced their all-new 2.0 liter turbocharged 4-cylinder petrol/gasoline engine in the X1 xDrive28.

Source: Autocar

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Comments (14)

Sacto8780
My guess is that this new engine--most likely a Flat-4 design--will be WAY better than the Subaru's Flat-4 and Flat-6 engines, mostly because it will sport features like variable valve timing on both the intake and exhaust sides and direct fuel injection. As such, the engine will get pretty decent fuel economy.
Jan 20, 2011 9:17 am
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me109a
Agreed
Jan 28, 2011 12:19 pm
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artimusthorn
1. Subaru has implemented variable valve timing in its engines since 2003. They named the original version that retards and advances cam angle "AVCS." It's been used in both the Flat 4 and the Flat 6. The EJ257 was in the US in the 2004 WRX STi, and it had AVCS if we want to focus on the US market. Also, the current Flat 6 used by subaru has both variable valve timing and variable valve lift. This concept of variable valve lift was actually used by subaru back in the 90s. I believe it was the 2006 models carrying the flat6 subaru engine that have both AVCS and AVLS, the EZ30R. Yes, those engines do not have direct injection. However, considering the issues seen by manufacturers with DI implementation and the longevity of said engine, I'm glad they have not already. If you want to point out an obvious fault on a subaru, stick to the real issues: Crap heads, poor oiling due to casting flash, poor oiling due to the pickup design, and weak connections between each of the case halves
Oct 28, 2011 2:52 pm
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ricer8
Don't know much about the power delivery on the Sti. My turbo 4 is the gti with a flashed ecu. What I mean by peaky is the torque is radically diff at 3500 than at 2500. I hear you on lightweight. I have s2000 as track car with r compounds and camber kit. Nothing gets away from me in the tight stuff. The engine in the s2000 is also peaky but it has so little torque it does not matter. What's not peaky is a BMW online 6. The smoothest motor I have driven with a flat torque curve
Jan 19, 2011 6:24 pm
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me109a
The STi has really good low end torque (weird for a four cyl engine). Coupled with AWD there is not much out there it will not spank to 60 ft. My point is the torque cureve is pretty flat (realative to other 4 cyl). Stage II gas milage does suck, but hell, on the track I use 1/3 tank for 20 min session so who cares about milage out there?
Jan 28, 2011 12:25 pm
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me109a
Highway milage can be atributed to better aerodynamics on the Phorsche. Not that I care all that much about milage in a performance car. The lower weight of a four cyl would help with the balance of the car in my opinion. 911s are a bit tail heavy. I know most Porche fans will settle for nothing less than a 6 cyl as most Corvette fans (me included) would never settle for less than a push rod V8. I don't know what you mean by "peaky" the power in my STi feels pretty linear and I have tracked it 30-40 times. NA Porsches kill me on the straights and big sweepers, but I destroy them on the trail brake high to low speed entries, tight esses, and hilly bits where you unload the suspension. I'm not that good of a driver so it's godda be the car (F engine AWD vs R engine AWD). If you are a great driver R engine RWD may be the ticket but I would likely stuff that b*tch in the fence.
Jan 19, 2011 5:28 pm
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ricer8
Not to mention the down side of such a motor. They tend to be very "peaky" in there power delivery. Entertaining but not confidence inspiring. Currently I have a 2.0 L turbo making about 268hp as my daily driver. Again it's entertaining but I would hate to have the boost come on mid corner when trying to hustle it around a track. When you get back behind the wheel of something with more displacement and a linear power curve it's wonderful
Jan 19, 2011 3:46 pm
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GS
WRX STi: 2.5L 4cyl, 305HP, City 17mpg, Highway 23 997 Carrera 4S: 3.8L 6cyl, 385HP, City 17mpg, Highway 25mpg Both AWD, both around 3200-3300lbs curb weight. Except one car has 100HP more, and better uses less fuel. Yeeeah... Subaru ain't that smart. Check out the worst offender, the Evo.. that thing uses more fuel than a 7.0L Corvette Z06.
Jan 19, 2011 3:15 pm
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GS
me109a: And Subaru's 4cyl boxer also happens to be one of the worst gas-guzzlers ever made (next to the Evo). Nice P.R., but at the end of hte day, this only belongs inside a Boxster or even a lesser model. Because reality is, their boxer-6 actually is pretty efficient for a high performance engine.
Jan 19, 2011 3:09 pm
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me109a
A properly balanced 4 cylinder turbo (hopfulley boxer) would be great for the 911. Less weight hanging out behind the rear axle can only enhance braking balance, maybe allow trail braking without a bunch of electronic interference. Look what Subaru has done with a 4 cyl boxer. 305 hp / 300 ft-lb torque on pump 91. And Formula 1 will be 4 cyl turbos soon, in the past they have gotten 900+ hp from 4 cyl turbos. Good and Good IMHO.
Jan 19, 2011 2:58 pm
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Zonda Addict
For the Boxster and Cayman. Understood. But for the 911?!?!?! that's just wrong...
Jan 19, 2011 2:16 pm
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Microice
Will Boxster become smaller and more of a TT rival? Or is this the engine of the rumoured new entry level model?
Jan 19, 2011 1:33 pm
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tuga
A 4 cylinder 911 wouldn't be blasfemy, it would be a 912. It just wouldn't make much sense now that they have the Cayman below the 911 in their line-up.
Jan 19, 2011 1:25 pm
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crwpitman
My thoughts exactly.
Jan 19, 2011 6:03 pm
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