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Enhanced i-DTEC diesel in Honda Civic delivers more power with lower fuel consumption

Power and torque in the enhanced i-DTEC engine. Click to enlarge.

Honda will launch the new Civic at the IAA Frankfurt Motor Show in September. Developed specifically for the European market, this Civic will be offered exclusively as a five-door hatchback and will compete in the C-segment. The new Civic will reach European showrooms in early 2012.

The new 2012 Honda Civic will feature a cleaner, more powerful and fuel efficient diesel engine to deliver lower running costs for owners. Improvements to Honda’s 2.2-liter i-DTEC engine, coupled with a low-drag body design, result in CO2 emissions of 110 g/km, while delivering a power output of 150 PS (148 hp, 110 kW) and 350 N·m (258 lb-ft) of torque.

The new ratings represent a 10 PS boost over the outgoing engine along with a drop of 29 gCO2/km over the outgoing model.

Honda’s i-DTEC engine received a number of enhancements in the quest for lower emissions. The oil flow through the engine has been carefully managed to reduce circulation loss, while engine materials and components have been revised to reduce friction. A five g/km reduction in CO2 was also achieved with the addition of Idle Stop (start/stop) technology.

Extensive wind tunnel testing was carried out to improve the car’s aerodynamics—a 12.6% improvement in CdA over the current Civic, reduce drag and refine high speed stability, all of which contribute towards lowering emissions.

To achieve a good CO2 figure, you need to optimize every aspect of the car. Reducing the emissions was our key target and we’re proud to say that we have achieved this without compromising the high performance character of the engine. We want our customers to have fun when they drive this car.

—Katsushi Watanabe, Development Leader for the engine

The first Civic was launched in 1972; the new version represents the 9th generation. More than 20 million Civics have been sold globally. The Civic range is produced in 14 countries and regions and sold in approximately 160 world markets.

Honda will release further information on the new Civic over the next few weeks in the runup to the global unveil on 13 September in Frankfurt.



A 2.2 diesel in a Honda Civic - mamma mia!

Maybe they need a smaller engine - still - quite an autobahn stormer - especially at 110 gms CO2.

Henry Gibson

This article demonstrates one of the reasons why solar cars and most solar energy won't work for the public. There is a 10 PS (7.5 kW.) advertised increase in the engine power up to now 110 kW. ( Shows a solar car of one kW. Every engine maker is advertising large and larger engines, but do not tell the public that 110 kW will never be delivered to the wheels and that this automobile will not even need 50 kw for the fastest autobahn speeds. Every automobile should be required to advertise its 100km/hr still air, level road, horse power requirement. Automobiles do not need even 10 kW for their ordinary uses. ..HG..


I don't understand Harvey.

Why/how does "this article demonstrate one of the reasons why solar cars and most solar energy won't work for the public."

And who cares " . that 110 kW will never be delivered to the wheels"?
or that " this automobile will not even need 50 kw for the fastest autobahn speeds." ?
[But yes it WILL need about 148 hp for the fastest autobahn speeds]

And why would anyone care about; "its 100km/hr still air, level road, [constant speed], horse power requirement" ?

I am quite sure that an even-half-way-normal, 4 passenger automobile needs well over 10 kW (like 40 hp, which is 3x 10 kW) for its ordinary uses; and that would be worse than the original Beatle with 36 hp – unacceptable for its ordinary uses, more so when we add AC, hills, freeways, air bags, crash protection.

And no, a little “tin” box made with an AFFORDABLE percentage of superlight space age materials will not cut it.


I cannot fully comprehend the discussion above, so I will comment on the original article instead.

I had to bring my magnifying glass to see the improvement. The Honda engine is 2.2 liter and puts out 150 hp. The “norm” for a state-of-the-art 2-liter engine is ~200 hp (if we exclude the latest BMW engine at 218 hp). Thus, the room for downsizing would be to go from a 2.2-liter engine to a 1.5-liter engine; perhaps also by reducing the number of cylinders from 3 to 4. In doing all this, a bi-turbo charging system would have to be used to get enough low-end torque and drivability. The norm for a single-turbo 2-liter engine is ~180 hp (e.g. VW @177 and BMW @184 hp). Thus, downsizing to ~1.7-liter would be feasible. Whatever of those numbers we choose; CO2 could be significantly reduced, i.e. below 100 g/km for this car, via downsizing. Apparently, Honda has joined the “anti-downsizing” club, as some other Japanese manufacturers. Mazda was a recent example but I would still regard that engine as much more advanced than the Honda engine. Maybe this Japanese car manufacturer should concentrate on technology they master, e.g. gasoline engines and hybrids. They could buy diesel engines from someone else.

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