Cylinder •Material: primary aluminium alloy with a high content of hardened and tempered silicon, cylinder liner with silicon carbide coating in a galvanic nickel die and crossed smoothing with two diamond passages with very limited tolerances. •Machining: on machine tools with high precision numerical control. •Cylinder-piston connection with an allowance of 0.05 mm. •Recalculated and upgraded heat exchange surfaces. Piston •Ultra compact with 3 rings. •Material: special aluminium alloy with high silicon content, low thermal expansion and a tin facing on the sliding surfaces. •Machining on machine tools with numerical control. •Lightened and reinforced.•Upgraded heat exchange surfaces. Piston rings •Compression - special rings with high sliding ease and very high mechanical resistance, in chromium-plated S10 spheroidal cast-iron. •1st scraper - ring in chromium-plated S10 spheroidal cast iron. •2nd three - piece scraper ring made of chromium-plated steel alloy.