Former Top Gearhost Jeremy Clarkson certainly has a grandiose presence.

His signature charm is something Amazon's banking on with its very expensive new motoring show The Grand Tourstarring Clarkson, as well as fellow Top Gearalumni James May and Richard Hammond.

Promotion-wise, the show has gone big. It may be already up to episode four in the U.S., UK, Germany, Austria and Japan; but is yet to launch in Australia or worldwide.

To promote its official arrival Down Under soon (even though you can already watch it without a VPN), a truck has been driving around Sydney, with a terrifyingly giant head of Clarkson on the back.

There's also a similarly huge busts of May and Hammond riding along too.

The trio was driven between various locations in the city. It parked in front of the Sydney Opera House and scuttled down to Bondi Beach.

Onlookers snapped pictures of it, as one would do.

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Giant heads. A good way to get attention, it seems.