I've been looking at the total cost of ownership for a number of options for replacing my aging motor. I am interested in cost, low emissions and appearance, in roughly equal measure. I currently have a Peugeot 406 Coupe, converted to run on LPG. I've done 90,000 largely trouble-free miles in this in 3 1/2 years, but it is getting old. The options I considered were: 1) Like-for-like replacement, a 4-5 year-old petrol car, converted to LPG 2) A small high-MPG diesel, such as a VW Polo Bluemotion. This would mean making the second car the one we use for family trips, but would do for my 60-mile per day commute. 3) A family-size high-MPG diesel, such as the Saab 9-3 TTID. 4) A Tesla S Below is a comparison of the costs per mile over a ten-year period, and the assumptions I've used to create them. I'd be interested in any comment, particularly around the running costs of an EV. 5-year life for old LPG vehicle, 10 for new vehicles. Negligible residual values. £20k purchase price for eg new Saab TTiD £15k for a new Polo Bluemotion £6k to purchase a used car and convert to LPG $60,000 for a Tesla, at £1=$1.6, plus 10% import duty and 20% VAT LPG is £0.78 per litre, rising 5% ahead of inflation Diesel is £1.40 per litre, rising 5% ahead of inflation LPG car gets 36MPG, large Diesel 62.5, small Diesel 68mpg Tesla S uses 250Wh per mile, at £0.092/KwH (my current price) and is 85% efficient wall-to-wheel No Road Tax for EV or small TDi, LPG and large TDi increase 5% ahead of inflation All vehicles require a £250 service every 10,000 miles Used vehicle gives 2 years before needing repairs, new ones 4 years. EV repairs are cheaper, due to no ICE parts to break ,and do not rise as car gets older All prices are at 2010 values - no inflation or cost of capital used except where described above. The black line, against the right-hand axis, shows the additional cost in GBP/day of running the Tesla S against the Saab. For scale, a pint of beer is £3 or a packet of Marlboro is nearly £7. If I allow an additional $10k for a larger battery (other optional extras excluded from all comparisons), the excess cost rises to £1.36/day at 25k miles pa, or £4/day at 17k miles. So, do I hand over my deposit now or wait until nearer the delivery time? The Peugeot can't last forever (162,000 miles on a car designed and built in Italy!) but when will European deliveries of the S begin?