Wed
May 16 2007

Secrets of Subaru's new diesel engine

Julian Rendell

Every car company faces environmental pressure, but not many have responded with the splendidly single-minded determination of Subaru.

Because when the new Impreza is unveiled at Frankfurt’s motor show in September, its brand-spanking, flat-four diesel engine will be a key feature, yet Subaru expects to make not a penny of profit from this much-needed new technology. Hard to believe, I know, but a senior executive at Subaru’s UK importer confided this fascinating snippet, apparently repeating what an exec in Japan said.

Maybe that comment was in jest, but with diesels taking about half of the European market and, in some countries and market segments, a much bigger proportion, it poses questions for Subaru’s long-term well-being.

Of course every car enthusiast can only applaud Subaru’s determination to go-it alone with the flat-four diesel, whose unique layout means that it can’t be sold or shared with any other car-maker.

Reputedly the design has been in development for 25 years, some of that time featuring the help of Toyota, and we know a few details, like the clever packaging of the intercooler below the engine that means it won’t force Subaru to spoil the bonnet line of the Impreza with a 1970s-era air intake. It also sits lower in the engine bay than today’s Impreza, which bodes well for road-holding, handling and turn-in.

Of course Subaru’s recent divorce from GM has helped force its hand into going it alone with the flat-four diesel, a move that’s also pushed Subaru into being a one-platform car-company.

Effectively the new Impreza is a short-wheelbase Legacy/Tribeca which means the introduction of a multi-link rear axle where previously there were struts. In that regard the Impreza matches up to Europe’s best, the Focus and Golf.

With global production of around 600,000 cars a year — which puts Subaru in the lower-middle ranking of the world’s car-makers — it can’t afford the diesel investment to drag it down. Saab, Porsche and Jag are 100k cars-a-year makers, hence their cost-volume conundrums, while the bulk of other established car-makers measure volume in millions.

The Impreza will hopefully address this shortfall. The new model is designed as a hatchback to broaden appeal and lift sales in Europe. In Japan, where hatchbacks sell in increasingly large numbers, it ought to do well too. Only for the US will there be a four-door sedan.

As if to reinforce that message, Subaru’s launch models at Frankfurt will have small capacity non-turbo engines – cooking models tasked with competing with the Focus, Golf, Megane et al. Not until Tokyo in October will the fire-breathing WRX STi models take a bow.

Let’s hope that the Impreza petrol-engined models get off to a good start at both these launches, because with all those diesel-engined models losing money for Subaru, profits have got to come from somewhere.

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About Julian Rendell

The man with the legendary contacts book. Once went 'under the wire' to scoop a secret Honda; also navigated a Fiat 127 in a road rally. Says the latter was only marginally more risky.

Comments

The Master February 22, 2008 5:35 PM

It's a very good bit of engine design that should be admired, but I think that they should have a push towards developing the quasieliptical engines (essentially a four chambered rotary) to run on compressed air-that would be a great engine!

noluddite December 29, 2008 4:26 PM

Like the way you have stood the Flat 4 on end - very representative. Now let's see an inverted V6, and a horizontal (vertical) 4.

suzzane May 15, 2009 7:44 AM

For buying a car there are certain variables you need to keep in mind, your budget, the price of the vehicle, the fuel consumption and the safety measures it includes. Comparing these and other important variables when going from car dealer to car dealer is not easy. But it is easy with online quotes. Doing this will save your money and help you to shop with more confidence. As you wouldn’t buy a valuable item without checking its price or specification you should not buy a car without comparing quotes and prices.

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suzzane May 15, 2009 7:47 AM

For buying a car there are certain variables you need to keep in mind, your budget, the price of the vehicle, the fuel consumption and the safety measures it includes. Comparing these and other important variables when going from car dealer to car dealer is not easy. But it is easy with online quotes. Doing this will save your money and help you to shop with more confidence. As you wouldn’t buy a valuable item without checking its price or specification you should not buy a car without comparing quotes and prices.

____________

For more information visit the link:

[url=http://www.carquotes365.com/]Car Quotes[/url]  

DeweyWins December 7, 2009 4:03 PM

I'm sure it's a terrific engine. And I'm sure that the car drives well. But don't for one moment think that a Legacy will be cheap to run. I recently offloaded a 2.5i petrol estate after some truly shocking repair bills. How does £1488 to replace a catalytic converter (one of two on the car) and lambda sensor (one of four on the car) grab you? All but about £80 of that was for parts. Both of them! Or how about £1500 to replace a clutch and flywheel? When the rest of the exhaust started blowing I was relieved to pay £499 incl VAT for a fully-fitted stainless steel system from a specialist after being quoted £733 from a Subaru dealer for the major parts in mild steel. Plus more £££ for incidental bits and pieces. Plus more for labour and even more for VAT. Make no mistake, once you've bought a Legacy, Subaru see you as a major source of revenue.

usedtrucks February 11, 2010 6:43 AM

Subaru introduces the first horizontally-opposed diesel engine to be fitted to a passenger car. This is a Euro 5 compliant engine with an EGR system. A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber during the final stage of compression.

www.usedtrucksforsaleusa.com/usedtrucksforsaleusa.php

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