Llinyn Adolygiad gyriant cyntaf: Citroen C3 VTi 82 VTR +

Mae triphlyg economaidd Citroen yn ddiymdrech ac yn werth da, ond mae'r Ford Fiesta yn parhau i fod yn ddewis y gyrwyrThis yw supermini C3 Citroen, yma wedi'i ffitio â Peugeot-Citroens injan betrol tri silindr newydd, a wnaeth ei ymddangosiad cyntaf yn y 208. Dywed peirianwyr PSA fod yr injan wedi derbyn 52 o batentau, 17 ohonynt yn ymwneud â dyluniad y pen silindr yn unig. Mae bloc yr injan yn cael ei fwrw o aloi alwminiwm ac mae'n ddyluniad cymhleth sy'n ymgorffori pwyntiau mowntio'r injan a'r dwythellau blinedig. Mae'r pen silindr yn cael pedwar falf fesul silindr, ac amseru falf amrywiol ar y cilfach a'r falfiau blinedig. Mae'r cwmni'n dweud, o'i gymharu â'r peiriannau pedwar silindr presennol, bod lefelau ffrithiant mewnol wedi gostwng 30 y cant. Dim ond hyn, fersiwn 80bhp mwy pwerus o'r injan tri pot sy'n cael siafft balans. Nid yw'r fersiwn lefel mynediad, 67bhp ar sail cost, ond nid yw Citroen yn bwriadu cynnig yr injan hon yn y DU ar hyn o bryd. Roedd ystyriaethau costau hefyd yn diystyru system stop cychwyn. Ceir ychydig o nodweddion peirianneg taclus: mae'r peiriannau cambelt yn cael ei iro o sbam olew yn y sump ac mae wedi'i gynllunio i bara bywyd y car. Gellir dad-gydio yn y gwregys hefyd pan fo'r car yn cyflymu, gan leihau'r llwyth ar yr injan. Yn ddiddorol, dywedodd ffynhonnell beirianneg wrth Autocar nad oedd gan PSA gynlluniau i adeiladu fersiwn tyrbein o'r injan hon, er gwaethaf llwyddiant 1 Ford. 0 litr, uned tri silindr, tyrbein. I fynd ynghyd â'r injan newydd, mae Citroen wedi addasu'r siasi C3, gan gynyddu'r cyfraddau gwrth-rolio tua 15 y cant a'r cyfraddau llaith o tua 20 y cant.

Citroen's economical triple is effortless and good value, but the Ford Fiesta remains the drivers' choiceThis is Citroen's C3 supermini, here fitted with Peugeot-Citroens all-new three-cylinder petrol engine, which made its debut in the 208. PSA engineers say that the engine has been awarded 52 patents, 17 of them related to the cylinder head design alone. The engine block is cast from aluminium alloys and is a complex design that incorporates the engine mounting points and the exhaust ducts. The cylinder head gets four valves per cylinder, and variable valve timing on both the inlet and exhaust valves. The company says that, compared to the current four-cylinder engines, internal friction levels have been reduced by 30 per cent. Only this, more powerful 80bhp version of the three-pot engine gets a balancer shaft. The entry-level, 67bhp version does not on cost grounds, but Citroen is not currently planning to offer this engine in the UK. Cost considerations also ruled out a start-stop system. There are a few neat engineering features: the engines cambelt is lubricated from an oil spay in the sump and is designed to last the life of the car. The belt-driven alternator can also be de-clutched when the car is accelerating, reducing the load on the engine. Interestingly, an engineering source told Autocar that PSA had no plans to build a turbocharged version of this engine, despite the success of Ford's 1. 0-litre, three-cylinder, turbocharged unit. To go along with the new engine, Citroen has modified the C3 chassis, increasing the anti-roll rates by around 15 per cent and the damping rates by around 20 per cent.