Porsche tries to bundle two special edition models by offering customers who order the 918 to also purchase the limited series 911 Turbo S.

Porsche has announced it will be taking orders on the 918 Spyder plug-in hybrid which it hopes to produced in a limited run starting in 2013.

Porsche would like to begin production in September 2013 on a limited series of 918 units at its Stuttgart-Zuffenhausen plant in Germany.

Starting prices in the United States will be $845,000. In Europe prices start at €645,000, subject to VAT and country-specific charges.

In order to spur sales, Porsche is bundling the 918 Spyder plug-in hybrid with the special edition 911 Turbo S. Only customers who order a 918 Spyder will also be able to get their hands on the limited series 911 Turbo S, in coupe or cabriolet form.

The 911 Turbo S "Edition 918 Spyder" begins deliveries in June in Europe. In Germany, the Coupé version is priced at €173,241 Euro and the Cabriolet at €184,546. The Coupé and Cabriolet are priced at $160,700 and $172,100, respectively, in the United States. And in the UK the Coupé costs £125,865 and £133,553 as a Cabriolet.

Details on the 918 Spyder plug-in hybrid are still sketchy. Porsche says it will come with a mid-rear mounted V8 displacing "more than 4.0 liters" producing around 500 PS (368 kW / 493 bhp). Two electric motors, one on each axle, will add 160 kW / 218 PS to that output total and making the 918 Spyder an all-wheel drive supercar. Transmission will be the seven-speed double-clutch PDK.

The 918 Spyder will do the 0 to 60 mph (96 km/h) sprint in just 3.1 seconds and will have a top speed of 199 mph (320 km/h).

A liquid-cooled lithium-ion battery provides the 918 Spyder plug-in hybrid with a range of around 16 miles (26 km) in electric mode and with a top speed over a limited distance of 94 mph (151 km/h).

Consumption will be impressive for a car with over 700 horses. Porsche claims the 918 Spyder will sport a 3.0 liters/100 km fuel-economy rating and CO2 emissions of just 70 g/km (112 g/mile).

Gallery: Porsche 918 price anounced at $845k - bundled with special 911 Turbo S