The Silhouette in a dark studio, front three-quarter view, roof up, in the Heritage pack's British racing green. A long bonnet with a scoop runs between raised front wings that peak over the wheels. Two slim white LED light blades sweep up each wing where headlamps would be. An oval grille mouth with fine mesh sits in a brass surround above a carbon splitter. A thin brass pinstripe runs along the flank to a white roundel with a black 6 on the door, behind four gills. Tan soft top, forged multi-spoke wheels in dark grey with brass calipers. Off brief: the mirrors are round chrome bullets on stalks rather than slim modern pods.

← the floor Kreation Silhouette/parts·if / 070

Costs and build reality

£6.3m to £12.1m to set up and £55k to £77k to build each car, which puts a realistic price at £96k to £143k against a £58k target.

The card

parts 07 of 07

Costs and build reality

parts 07 of 07idea_070

The notes

rendered

All figures are my own rough estimates for planning, not quotes. They assume about 500 cars over the first five years.

one-off setup and development

Item	Cost
Engine development, prototypes, dyno and calibration	£1.5m to £3.0m
Chassis and vehicle engineering, 4 to 6 prototype cars	£2.0m to £4.0m
Body design, patterns and moulds	£0.6m to £1.2m
LED blade lighting development and approval	£0.3m to £0.6m
Approval and testing	£0.4m to £0.8m
Facility fit-out, jigs, oven, dyno cell, paint booth	£1.5m to £2.5m
Total	£6.3m to £12.1m
Per car over 500 cars	£12,600 to £24,200

build cost per car

Item	Cost
Engine, including supercharger	£12k to £16k
Sequential transaxle and paddle shift	£10k to £15k
Chassis and carbon body	£7k to £10k
Suspension, brakes, wheels, tyres	£5k to £7k
Interior, soft top and trim	£4k to £6k
Electrics, ECU, LED lights	£3k to £5k
Labour, around 350 to 450 hours	£14k to £18k
Total	£55k to £77k

what this means for the price

£58k including VAT is about £48k to the maker, which is below the estimated build cost before any development is paid back. Adding development recovery and an 18% margin, the price lands at roughly £96k to £143k including VAT.

Ways to close the gap: a cheaper gearbox, a naturally aspirated entry model without the supercharger, fewer carbon panels, higher volume, or outsourcing the engine build to an established specialist.

build reality

Engine joining is the big job. Two bike engines cannot simply be bolted together. Builders such as Hartley have done this before, with Hayabusa heads on a custom billet crankcase, which is the model here. Budget for real development time.
Price pressure. The cost estimates above put a realistic price well above the £58k target. The headline price needs a decision before the business case goes further.
UK road approval. A small maker would go through Individual Vehicle Approval. Drive-by noise limits are the main risk for a high-revving engine, so the exhaust needs valves for a quiet mode.
Supply. Donor parts depend on one manufacturer's engine continuing in production.

All performance figures are design targets or estimates, not tested numbers.