To help further reduce weight, new thin-wall hollow camshafts are used. The cam drive is maintenance free throughout the life of the engine. With exhaust port cast directly into the cylinder head, the need for a traditional separate exhaust manifold is eliminated.Ī low-friction, silent-chain drives dual overhead cams and four valves per cylinder. The direct-injected Civic 4-cylinder turbocharged engine has a lightweight DOHC cylinder head that is made of pressure-cast aluminum alloy. Lightweight, high-strength steel connecting rods are heat-forged in one piece and then 'crack separated' to create a lighter and stronger rod with an optimally fitted bearing cap. Ion-plated piston rings help reduce friction for greater operating efficiency. The pistons are cooled by twin oil jets directed at the underside of each piston crown. The lightweight pistons have a carefully optimized skirt design to minimize reciprocating weight, which minimizes vibration and increases operating efficiency. The 1.5-liter engine's pistons help maintain stable combustion and contribute to improved efficiency with 'cavity-shaped' crowns. Each journal on the lightweight forged-steel crankshaft is micropolished to reduce internal friction. Cast-in iron cylinder liners provide long-lasting durability. The Civic's new 1.5-liter inline four has a lightweight die-cast aluminum block with individual reinforced main bearing caps to minimize weight. See the 1.5 L Turbo engine animation for a visual representation of prominent engine features and functions. The turbocharged 1.5-liter engine is rated at 174 horsepower at 5,500 rpm3 with 162 lb.-ft of torque between 1,800 and 5,500 rpm.4 The Civic Turbo is anticipated to be rated by the EPA at 31/42/35 mpg.6 Honda put out a lot of info about the engines here:

But even with a Honda, I suppose it's fair to say that only time and mileage will tell.Īffordable HondaCare warranties are available that can cover the car for up to 8 years and 120,000 miles.

I believe that Honda has put a lot of outstanding engineering into the 1.5 turbo to make it a great and long-lasting engine. The turbo, however, is an all-new engine, and turbos are by definition more complicated and have more things that can eventually wear out. In terms of durability, both should be very long lasting and reliable engines. The turbo is more powerful and faster, but a little bit louder.

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