Two New Diesel Engines For The Toyota Avensis
Published: 2nd March 2005
Toyota 2.2-Litre D-4D Engine
The first of Toyota’s new 2.2 D-4D engines to arrive in the UK market will be the standard 148bhp unit, joining the established 114bhp 2.0 D-4D in the Avensis range. In common with all other engines, petrol and diesel, powering the Avensis, the new unit complies with Euro IV emissions standards.
Owners will reap big benefits in terms of performance, refinement and running costs. Preliminary data for the new engine indicate a 130mph top speed and nought to 62mph acceleration in 9.3 seconds, while targeted figures for combined cycle fuel consumption and carbon dioxide emissions are 47.1mpg and 157g/km (hatchback and saloon versions).
Toyota is pushing forward diesel engineering by adopting an all-aluminium construction for the 2.2 D-4D. The subsequent weight saving over the more conventional iron build design helps contribute to the engine’s strong performance profile.
In common with the more powerful 2.2 D-4D Clean Power, the engine is matched to a new six-speed manual transmission that is compact and offers smoother and more precise gear changes.
Toyota 2.2 D-4D Clean Power
The new 2.2 D-4D Clean Power is lighter than most engines in its class (1.9 to 2.2-litre), thanks to its all-aluminium construction, something that is still rare among diesel engines. Clever engineering measures include integration of the water and oil pump on the chain cover, reducing the oil pump’s weight by five per cent and its volume by 20 per cent. This contributes to making the engine 11 per cent lighter overall than the Avensis’s 2.0-litre D-4D engine.
Further reductions have been made in noise and vibration by adopting a balancer shaft. This substantially reduces booming - by up to 10dB at higher revs.
The Clean Power engine also has the lowest compression ratio of any production diesel engine: 15.8:1. This means the piston requires less effort to compress the air-fuel mixture, something that has been made possible by the use of an advanced common rail injection system and improved ceramic glow plugs that operate at much higher temperatures than previous D-4D engines (up 100° C to 1,175° C), enabling more efficient cold starting. Combustion is quieter and there is less build-up of heat in the piston bowl for a more efficient burn and, in turn better fuel economy and lower emissions.
The new engine uses the same cylinder liner material as Toyota’s current 1.4-litre D-4D engine, which has already shown superior wear resistance and good adhesion to aluminium
Toyota Avensis
Our Toyota Avensis Guide lists the full specification of the current UK Avensis range, including car prices, fuel consumption, dimensions and other vital data.
Price Range: £14,545 - £23,205
Body Styles:
Fuel:
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Models in the range: 28
We have road tested the Toyota Avensis, to read our in-depth car review:
Toyota Avensis Review - Jan 2007
Our Car Buyer’s Guide covers all of the UK’s major new cars and includes CO2 ratings and car insurance groups. Data updated on the 21st Sep 2008
