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Buick Regal GS

The current generation Chevrolet Malibu is available with I4 and V6 engines

The 2011 Kia Optima SX (pictured above) like its Hyundai Sonata relative will only be available with four-cylinder engines
CAFE leads to engine downsizing for GM

Manufacturers are preparing for upcoming CAFE changes which will require corporate fleets to average 34.1 mpg by 2016. As a result, a number of auto manufactures are turning to direct injection, turbocharging, hybrid technology, and full electrics to boost their fleet fuel economy.

General Motors is taking a big step, according to GM Inside News, to improve the fuel economy of its bread and butter midsize sedans. The next generation Chevrolet Malibu (due out as a 2012 model) will reportedly only be available with four-cylinder engines.

The current generation Malibu is available with a four-cylinder base engine and an optional six-cylinder engine like most other midsize sedans on the market. It's likely, however, that the next Malibu will use two new four-cylinder engines featuring direct injection technology -- the base engine will be normally aspirated while the uprated motor will be turbocharged.

GM already uses this approach with the new 2011 Buick Regal. The base Regal is available with a 2.4-liter four-cylinder engine producing 182 hp and 172 lb-ft of torque. An optional 2.0-liter turbo four-cylinder engine producing 220 hp and 258 lb-ft of torque will be made available later in the model year. An even more potent Regal GS will come later next year with an uprated turbo four producing 250+ hp.

Another manufacturer that is going four-cylinder-only is Hyundai (along with its accompanying Kia brand). The 2010 Sonata is currently only available with a 2.4-liter four-cylinder engine (24/35 mpg). The 2011 Sonata will be available with a 2.0-liter turbo four cylinder which outpowers and outgrunts the optional V6s in other midsize sedans while delivering 22 mpg in the city and 34 mpg on the highway. Both powertrains will also make their way into the upcoming 2011 Kia Optima.

Toyota's Camry and Honda's Accord are both due for complete redesigns within the next two years, so it would be interesting to see if they too go for a top to bottom four-cylinder engine lineup.



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RE: Another Reason NOT to buy a GM
By FITCamaro on 9/1/2010 1:00:06 PM , Rating: 2
Actually the Malibu with the same turbo-I4(260 hp/tq) as the Cobalt SS/Solstice Turbo/Sky Turbo would be fine. It'd also make upping the horsepower far easier since then all you need is a boost controller. You can even boost it to 290 hp/tq at a GM dealership and keep your warranty. That's the same power practically as the direct injected V6 in the new Camaro and Cadillac CTS.

Of course it's looking like they're gimping the power for regular passenger cars but turning up the boost won't be hard. Of course I'm sure there's a different cam in it as well.

Of course to me I'd rather see a new RWD Buick Regal T-Type with a turbo V6. ;)


RE: Another Reason NOT to buy a GM
By Spuke on 9/1/2010 2:08:52 PM , Rating: 2
More than likely the LNF would be used since the development is already there. The Regal GS is supposed to have 255hp and 290 lb-ft of torque from what I understand. Should be a fun car.
quote:
It'd also make upping the horsepower far easier since then all you need is a boost controller.
On Bosch DI ECU cars, you need to crack the ECU to make boost controllers sort of work else the ECU just dials back the boost. Besides, the ECU will raise or lower as required to meet the requested torque. So if your at 10,000 feet and you want 290 lb-ft of torque, the ECU will raise boost (and change other parameters) until it meets the request. Boost can be lowered or raised depending on altitude and other conditions so long as the requested torque is met. So boost controllers kind of don't work anyways because the limit isn't boost, it's torque.


RE: Another Reason NOT to buy a GM
By FITCamaro on 9/1/2010 5:07:13 PM , Rating: 2
I'm sure tuning software exists out there. HPTuners is out there for LSx model engines. But yes its not as easy as just hooking up a boost controller.


RE: Another Reason NOT to buy a GM
By Spuke on 9/1/2010 9:12:35 PM , Rating: 2
quote:
I'm sure tuning software exists out there. HPTuners is out there for LSx model engines.
HPTuners is available for the LNF. :) But not everything is unlocked yet. Trifecta has pretty much everything unlocked.


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