Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Mystery Mercedes 600 six-door Landaulet heads to auction

There are ambitious project cars, and then there is this: a 1971 Mercedes-Benz600 Six-Door Pullman Landaulet that'll be offered at RM Auctions' Retromobile sale in Paris on Feb. 5. One of just 26 built, this example was recently rescued from the state motor pool of an unnamed African country with the consignor unwilling to reveal the car's exact provenance.

Hyundai i40 Hybrid & i30 CNG: Paris 2014

The Hyundai i40 Hybrid & i30 CNG on the floor in Paris Hyundai is busy trying to find ways to reduce emissions and increase economy – just like every other car maker – and has arrived at the Paris Motor Show with a pair of economy-focused models – the Hyundai i40 mild hybrid and an i30 running on compressed natural gas (CNG). The Hyundai i40 gets a 48V mild hybrid setup just like the Kia Optima-T Hybrid, which means a 48V lead-carbon battery which cuts emissions from the 1.7 litre diesel by up t0 20 per cent by allowing electric-only running at low speeds and when cruising and, just like the Optima, the i40 hybrid gets a belt-driven starter generator for seamless restarting, which also contributes to engine power in normal running. The beauty of the system – apart from improvements in economy and emissions – is that it’s very light compared to a full hybrid – just 46kg – and costs 75 per cent less than a full hybrid system to install.

Citroen to launch range of Green, Eco cars

Citroen C-Cactus Concept will form the basis of a new range of Citroen Eco-Cars The first of the new range will be based on the existing C4, but feature bodywork based on the C-Cactus Concept (but a wee bit prettier, we hope) and featuring a range of green and economical propulsion systems. Under consideration are an electric version (EV),  a  form of hybrid technology or simply lopping a cylinder off and aiming to bring the Co2 down to under 100g/km. So that will give Citroen three distinct ranges.