Manchester is about 3.6 times smaller than Vienna.

Vienna is approximately 415 sq km, while Manchester is approximately 116 sq km, making Manchester 27.87% the size of Vienna.
Tip: This to-scale comparison of Vienna vs. Manchester uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.