mossy7 Posted March 30, 2017 Share Posted March 30, 2017 So... Out in the 7 today. Glorious weather it was too. I was able to get her weighed at a calibrated weigh bridge. Turns out she is 260kg on front axel and 290 kg on the rear. By my maths that's 550kg and some way off what Caterham say. For the record, it's an S3, 1.6 Sigma on 15 inch ten spokes, nearly a full tank of fuel and weighed without a passenger or driver aboard. I'm some way off the 280bhp per tonne the Caterham salesman sold me on. More power needed!! Link to comment Share on other sites More sharing options...
Paul McKenzie Posted March 30, 2017 Share Posted March 30, 2017 I think you need a Class Action like we VW owners deduct the 40 kg of fuel and you're there Link to comment Share on other sites More sharing options...
mossy7 Posted March 30, 2017 Author Share Posted March 30, 2017 How much does 36L of fuel weigh then?? Quick google....... And 36L multiplied by 0.74 equals 26.64 kg... Hmmmmmm is that the way Caterham weigh a 7? Dry of fluids? Tut tut. Link to comment Share on other sites More sharing options...
Alastair B Posted March 30, 2017 Share Posted March 30, 2017 Have you got any of the following in your car?carpet on tunnel or rear bulkhead, mats, doors, roof, jack, tools, tyre foam, stainless wing protectors...not enough carbon (4 x wings, nose cone)?Not defending Caterham's marketing, but you can see if it could be removed or upgraded to the highest specification possible for weighing I bet it was. Link to comment Share on other sites More sharing options...
mossy7 Posted March 30, 2017 Author Share Posted March 30, 2017 AlstairI also have leather seats and a lump of glass on the front. I guess you are right but perhaps they should be more up front, especially as they market cars based on a power to weight ratio suggesting all cars are 500kg. ( 270, 310, etc) In any case, if anyone wondered how much their Sigma engined S3 weighed in standard S or Roadsport spec, there ya go. Link to comment Share on other sites More sharing options...
simon_h Posted March 30, 2017 Share Posted March 30, 2017 Its not really a power to weight anymore. Its more a notional double the power then rounded to give a nice number. Link to comment Share on other sites More sharing options...
andy couchman Posted March 31, 2017 Share Posted March 31, 2017 Power to weight is a good comparator - provided you never add a driver. If you do, light cars suffer more as the driver adds a bigger percentage of the original pure car weight.Autocar once published a letter wot I wrote suggesting PTW should be based on car weight plus fluids and the nominal weight of a driver. Their road tests are also based on two people in the car - hence 7 acceleration figures will usually be quite a lot slower than Caterham's.But yes, more power is always good!Andy Link to comment Share on other sites More sharing options...
Gunscrossed Posted March 31, 2017 Share Posted March 31, 2017 Add lightness? Link to comment Share on other sites More sharing options...
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