QUOTE(Talez @ Nov 24 2007, 09:27 PM)

The EJ15 is a much neglected engine in Subaru's lineup. It's a SOHC with poor economy and power compared to the 2NZ-FE. The EL15 would be far more likely but that develops even less power (110ps vs 120ps) than the 2NZ-FE. The car's target weight has already been stated as under 1 ton and this is quite achievable for a 3-door coupe style with modern materials.
Keep in mind the AE86 only developed 130ps in the first version of the 4A-GE and 120ps in the second generation so a 120ps 2NZ-FE isn't out of the question when we're looking at the same sorts of weight. This isn't supposed to be a sports car to take on your WRX. It's to attract the kids with a sort of kit car. The 2NZ-FE is incredibly compact so you're going to be looking at a lot of room under the bonnet with bolt on turbos and what not and I wouldn't be suprised if they generally started taking advantage of the Scion style business model where they sell a premium line of performance parts and the base car is incredibly cheap.
A new Sprinter will NOT come in at under 1,000kg. Yes it could be done using modern materials, even on a bigger chassis like that of the Impreza, but lightweight materials are expensive. This will either be under 1,000kg and over $35,000 (for a basic model), or over 1,100kg and under $25,000 for a basic model. The basic model WILL come with a 1.5L engine, and I would presume it would have a 2.0L engine for a performance version. IF we get the new Sprinter here (assuming it gets built), I would put a substantial bet on it costing over $30,000 for a basic model, but that basic model would come with a 1.8 or 2.0L engine. The 1.5L engine will be the basic Japanese model - remember they get 1.4L engines in their Auris/Corolla while we only get the 1.8L (thank goodness).
I agree that the EL15 motor is more likely than the EJ15, as the EL15 is what Subaru are rumoured to be using for their RWD sportscar their developing along side the new Sprinter. The EL15 has DOHC, which even if it's not providing more power, is more 'sporty' sounding (for advertising purposes) than only SOHC.
However, I wouldn't be surprised if Toyota do end up using their own engines for the Sprinter and leaving Subaru to use boxers. The boxer layout is too iconic for Subaru. Therefore any magazine reviews of the vehicle are going to mention Subaru drivetrain, which I'm sure wouldn't settle too well with Toyota. The 1NZ-FE would make sense as a basic motor for the Sprinter, moving up to the ZR-series of engines for the more sporting models. My bet is on a 3ZR-FAE powered version as the top of the line for Toyota as it has 158hp (118kW) and 196Nm, which should do if they can bring the weight in at under 1,200kg. Assuming the same percentage power and torque increase as the TRD Aurion has vs. the standard Aurion (240kW & 400Nm vs. 200kW & 336Nm), then a TRD Sprinter could potentially have 142kW and 234Nm. Of course, the Aurion only has a fairly mild tune, so it wouldn't be at all surprising if these figures were more like 150kW and 250Nm. In a 1,200kg car that's going to provide quite good performance. Of course, it could also end up costing around $50,000.

QUOTE(Tayles @ Nov 24 2007, 10:26 AM)

It would have to have at least 100kW to be more than just a niche market vehicle. If it had a relatively weak power figure, even granted the RWD lightweight platform, Australians would not buy, except for the 0.001% of the population who understand the spirit of Hachi Roku. To be financially viable in Australia, it would need to be able to pinch a few customers from other performance models like Golf, WRX etc, even though these are in a higher price bracket. With such a small engine as the 1NZ, it will not be viewed as a performance car, and will end up in the driveways of hairdressers and secretaries, much like the late Celica.
1.5L engine will be for Japan (and Europe). Markets like Australia and the US would be more likely to have a 1.8L engine as the minimum. Of course, it will cost close to $30,000 once it gets here. Probably more like $35,000. It will be marketed as a sports car after all, and will probably be intended to fill the gap left by the Celica.