If you're wondering who what and how, here's some more details.
"In every category, the panelists judged each shortlisted engine using their subjective driving impressions and technical knowledge, and took into account characteristics such as fuel economy, smoothness, performance, noise and driveability. The jurors each had 25 points to spend on their five favourite engines in each class. The maximum points that could be allocated to one engine was restricted to 15, while the minimum reward was one mark. An engine could not be tied for the top slot."
1.4-litre to 1.8-litre
1. BMW-PSA 1.6-litre Turbo (Cooper S, Peugeot 207)
267
2. Toyota Hybrid 1.5-litre (Prius)
251
3. Audi 1.8-litre Turbo FSI (A3)
82
4. Peugeot-Citroën/Ford Diesel 1.6-litre (Fiesta, Ford C-Max, Citroën C4, C4 Picasso C5, Mazda 3, Peugeot 1007, 206, 307, Partner)
74
5. Honda 1.8-litre (Civic, Stream, FR-V)
65
6. Mercedes-Benz 1.8-litre Supercharged (C, SLK, CLK, E)
62
Link: 1.4 to 1.6 category
1-litre to 1.4-litre
1. Volkswagen 1.4-litre FSI (TSI) (VW Golf, Touran, Jetta)
404
2. Honda Hybrid 1.3-litre IMA (Civic)
178
3. Fiat-GM Diesel 1.3-litre (Panda, Grande Punto, IDEA, Doblo, Lancia Ypsilon, Musa, Opel/Vauxhall Agila, Corsa, Astra, Meriva, Tigra, Combo, Suzuki New Ignis)
160
4. Renault 1.2-litre Turbo (Clio)
123
5. Peugeot-Citroën/Ford Diesel 1.4-litre (Citroën C2, C3, Ford Fiesta, Fusion, Mazda 2/Demio, Peugeot 1007, 207, 307)
66
6. BMW-PSA 1.4-litre (MINI One)
56
Link: 1.0 to 1.4 Category