A Roumulan squadron of 4 D'deridex warbirds comes across an Imperial force of 2 ISD and 2 Victory class ships.
The Romulans order the Imperial ships to surrender, the Imperial ships refuse. The battle starts when they are 1 million km from each other, with an initial relative closing speed of 10,000km/sec.
Who will win. For this scenario, assume that both sides have generic (ie no Sith!) but inteligent crews, manning fully operational ships. Assume that Romulan cloaks work on Imperial ships pretty much as they do on Federation ships. Assume that each ISD carries 12 TIE bombers, 12 TIE advanced and 48 standard TIEs (this is standard complement). A local space-time inversion (yes, that is technobabble!) has made warp and hyperspace impossible for the next six hours!)