Lamborghini is doing better than ever thanks in large part to the Urus SUV and regular updates of the Aventador and Huracan Evo along with ultra-exclusive supercars like the Sian. But the Volkswagen Group-owned company wants to expand its portfolio even further with a fourth model line. Question is, what will it be? Previous rumors suggested a GT car inspired by 2014's Asterion concept. And it looks like, that's exactly what's happening.

A new report from Autocar has confirmed Lamborghini's fourth model line, due in 2025, will be a 2+2 grand tourer inspired by the Estoque concept which debuted way back in 2008. Even more interesting is that it could become the brand's first-ever fully electric vehicle.

This four-seater won the business case over a third mid-engined supercar and the report claims Lamborghini debated whether the vehicle will be front or mid-engined. Turns out, something even more radical is planned, electrification. Lamborghini R&D boss Maurizio Reggiani told Autocar that "If you look at the timing for a fourth model line, there is the potential that this will be the right time for a full-electric vehicle." He's absolutely right.

The Porsche Taycan has just arrived and next year the Audi e-tron GT will debut. Both all-electric sedans ride on the same platform and it will make complete sense for Lamborghini to further utilize it as well, although with its own unique set of modifications. Sharing this platform will also help Lamborghini significantly reduce development costs. There's also another major benefit of having an EV in the lineup: lower the brand's overall C02 emissions.

Let's face it, even naturally aspirated V10s and V12s paired to a hybrid setup, which will most likely happen beginning with the Aventador's successor, are still not the most fuel-efficient options. It certainly helps, as does the Urus' twin-turbo V8 powertrain, but a pure battery-electric will further offset emissions. Lamborghini would not proceed with this all-electric sedan project if it wasn't confident it could make it a proper Lamborghini with extreme performance capabilities.

"Performance will be important [in a 2+2]," Reggiani explained. "We must be fast but not quite in the same way as we need to be in our super-sports cars. A fourth model line will be something a little bit different." Expect a range of at least 350 miles and a sub-three-second 0-60 mph time. But why wait until 2025 for this? Can't it happen sooner? "There's a minimum of four years in advance of launching a model to develop it," Reggiani explained.

General styling will be pure Lamborghini, although it will more mature-looking than the outright outrageous Sian. There will be some influence from the Estoque, but given that the concept is over a decade old, modern styling changes will inevitably be applied.