Bonus engines

Engine	Description
Career engine	The Career engine is one that you can earn and gradually upgrade from achievements and follows you through your rail nation career across games.
Pollux	The Pollux Engine is added to new servers since between Feb 11th 2021 and is gradually upgraded through Bonus video rewards.
Primus	The Primus engine is one that you can win in lotteries or sometimes get when buying gold. It adapts with abilities to each era it is in.
Ice-breaker	The Ice-breaker is a special engine only available during the winter event, you can keep it untill the end of the server. Its attributes are adjusted to the era you win it in.
Magnus	This Magnus engine is one that you can win through Daily Power Bonus. Once activated it is only available for 24 hours. It adapts with abilities to each era it is in.

Career engine	Maximum upgrade limit for the era
	Era	Tractive force	Reliability	Acceleration	Speed
	1	7	100	20	150
	2	11	100	20	175
	3	15	100	20	200
	4-6	30	100	20	300

Pollux	Max stats on 1st day
	Era	Tractive force	Reliability	Acceleration	Speed
	1	1	20	1	50
	2	4	30	4	80
	3	7	45	7	100
	4	10	60	10	120
	5	14	70	13	140
	6	17	85	15	165
	EG	20	100	20	180

Primus	Era	Tractive force	Reliability	Acceleration	Speed
	1	3	95	13	90
	2	4	95	13	115
	3	6	95	13	125
	4	8	95	13	145
	5	10	95	13	155
	6	13	95	13	250

Ice Breaker	Era	Tractive force	Reliability	Acceleration	Speed
	1	3	95	13	90
	2	6	90	5	100
	3	8	85	6	110
	4	9	80	3	140
	5	10	75	7	170
	6	13	70	5	220

Magnus	Era	Tractive force	Reliability	Acceleration	Speed
	1	3	100	10	170
	2	4	100	12	180
	3	5	100	14	190
	4	6	100	16	200
	5	7	100	18	220
	6	9	100	20	240