honda cars, Motoring News, new models

Super-frugal diesel Civic on way from Honda

  • Enhanced 1.6 litre i-DTEC from March 2018
  • Stronger pistons, low-friction cylinder bores
  • Power still 90kW with torque at 300Nm
2018 HONDA CIVIC DIESEL. Image: Honda UK / Newspress
2018 HONDA CIVIC DIESEL. Image: Honda UK / Newspress

LONDON, England – A comprehensively revised 90kW 1.6 litre i-DTEC diesel engine will join the Honda Civic range in Europe from March 2018 with the promise of really low fuel consumption.

Honda’s promise: “An outstanding combination of performance and efficiency.” And a nine-speed auto is on the way.

The engine is one of the first to be officially tested under the new Worldwide Harmonised Light Vehicle Test Procedure fuel consumption and emissions cycle which is about to come into force.

2018 HONDA CIVIC DIESEL. Image: Honda UK / Newspress
2018 HONDA CIVIC DIESEL. Image: Honda UK / Newspress

While data from the familiar New European Driving Cycle test is based on a theoretical driving profile the new cycle is intended to use actual driving data from around the world.

“The results,” Honda says, “should be closer to real-world driving.”

Honda says it has has made significant improvements to the engine and its exhaust to maximise real-world performance. “The efficiency enhancements for the new Honda Civic 1.6 i-DTEC,” the automaker says, “have brought fuel consumption down to 3.72 litres/100km.”

READ MORE Honda Civic features on Carman’s Corner

Changes to the 1.6-litre diesel include less cylinder friction, thanks to pistons made of highly durable chromium-molybdebnum steel alloy and special honing of the bores.

The 1597cc engine has the same Bosch fuel-injection system as before with a “small but high-efficiency” turbocharger, low-pressure exhaust-gas recirculation and a high-intake flow, high-swirl cylinder head port.

A strong but light and slender crankshaft and all-aluminium, open-deck, high-pressure, die-cast engine block minimise the engine’s weight.

2018 HONDA CIVIC DIESEL. Image: Honda UK / Newspress
2018 HONDA CIVIC DIESEL. Image: Honda UK / Newspress

“For the new i-DTEC,” Honda says, “additional cast ribs have been added to the block to increase rigidity and so improve the management of noise, vibration and harshness.”

The 1.6 i-DTEC is also one of the first engines to be officially tested through the ‘Real Driving Emission’ procedure to validate NOx and particulate emission levels. The diesel power train has a new NOx storage converter system with larger catalysts and a higher content of silver, platinum and neodymium) that store nitrogen oxide gas until the regeneration cycle.

A soot sensor accurately detects when the regeneration cycle is required, extending exhaust component durability.


The 1.6 i-DTEC engine produces 90kW at 4000rpm and 300Nm at 2000rpm which can take the Civic to 100km/h in 10.4 sec. The units will be assembled at Honda UK and be available in four- and five-door variants of the new 10th-generation Civic.

By mid-2018 a nine-speed auto transmission will further bolster the Civic’s powertrain options – its first in a two-wheel drive car.

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