2.0 inline 4 cylinder with a 150,000 mile warranty. I haven't found any real stats yet but I'll post if I do. Sounds like they incorporated a lot of tech into it so I'm kind of curious.
Looks quite narrow, probably for squeezing through traffic...
http://www.autoguide.com/auto-news/2012/04/nissan-reveals-production-spec-nv200-yellow-cab-2012-new-york-auto-show-preview.html
http://www.telegraph.co.uk/news/worldnews/northamerica/usa/9182654/New-Yorks-yellow-taxi-Nissan-redesign-to-be-unveiled.html
http://www.autoblog.com/photos/2014-nissan-nv200-taxi-new-york-2012/#photo-4939501/
B