As some gains are followed by some losses, the new car appearance will probably come with a smaller engine. The reason for this is that the 6-litre V12 engine that is used on the current Sirius model will probably be phased out by Mercedes-Benz and there won't be another V12 from the German automaker anymore. In the V12 place Lotec will very likely use a V8 with supercharger, already present in AMG models.
Even with the smaller engine, Lotec is sure to ensure the same performance levels (or even better) with some changes in the V8 engine and some car weight reduction, currenty at 1,280 kg. Sirius is 4.12 m long, 2.01 m wide and 1.12 m tall, but the new model may have different specifications. We'll be sure about it when official information is also released.
Source: Le Blog Auto