diff -r 6fd300b20503 -r 168d3add1f13 src/train_cmd.cpp
--- a/src/train_cmd.cpp	Wed Apr 18 18:20:31 2007 +0000
+++ b/src/train_cmd.cpp	Wed Apr 18 18:37:40 2007 +0000
@@ -63,7 +63,7 @@
  */
 void TrainPowerChanged(Vehicle* v)
 {
-	uint32 power = 0;
+	uint32 total_power = 0;
 	uint32 max_te = 0;
 
 	for (const Vehicle *u = v; u != NULL; u = u->next) {
@@ -76,19 +76,22 @@
 
 		const RailVehicleInfo *rvi_u = RailVehInfo(u->engine_type);
 
-		if (engine_has_power && rvi_u->power != 0) {
-			power += rvi_u->power;
-			/* Tractive effort in (tonnes * 1000 * 10 =) N */
-			max_te += (u->u.rail.cached_veh_weight * 10000 * rvi_u->tractive_effort) / 256;
+		if (engine_has_power) {
+			uint16 power = GetVehicleProperty(u, 0x0B, rvi_u->power);
+			if (power != 0) {
+				total_power += power;
+				/* Tractive effort in (tonnes * 1000 * 10 =) N */
+				max_te += (u->u.rail.cached_veh_weight * 10000 * GetVehicleProperty(u, 0x1F, rvi_u->tractive_effort)) / 256;
+			}
 		}
 
 		if (HASBIT(u->u.rail.flags, VRF_POWEREDWAGON) && (wagon_has_power)) {
-			power += RailVehInfo(u->u.rail.first_engine)->pow_wag_power;
+			total_power += RailVehInfo(u->u.rail.first_engine)->pow_wag_power;
 		}
 	}
 
-	if (v->u.rail.cached_power != power || v->u.rail.cached_max_te != max_te) {
-		v->u.rail.cached_power = power;
+	if (v->u.rail.cached_power != total_power || v->u.rail.cached_max_te != max_te) {
+		v->u.rail.cached_power = total_power;
 		v->u.rail.cached_max_te = max_te;
 		InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
 		InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, STATUS_BAR);
@@ -208,9 +211,10 @@
 			}
 
 			/* max speed is the minimum of the speed limits of all vehicles in the consist */
-			if ((rvi_u->railveh_type != RAILVEH_WAGON || _patches.wagon_speed_limits) &&
-				rvi_u->max_speed != 0 && !UsesWagonOverride(u))
-				max_speed = min(rvi_u->max_speed, max_speed);
+			if ((rvi_u->railveh_type != RAILVEH_WAGON || _patches.wagon_speed_limits) && !UsesWagonOverride(u)) {
+				uint16 speed = GetVehicleProperty(u, 0x09, rvi_u->max_speed);
+				if (speed != 0) max_speed = min(speed, max_speed);
+			}
 		}
 
 		/* check the vehicle length (callback) */
@@ -3473,8 +3477,11 @@
 
 	do {
 		const RailVehicleInfo *rvi = RailVehInfo(v->engine_type);
-		if (rvi->running_cost_base > 0)
-			cost += rvi->running_cost_base * _price.running_rail[rvi->running_cost_class];
+
+		byte cost_factor = GetVehicleProperty(v, 0x0D, rvi->running_cost_base);
+		if (cost_factor == 0) continue;
+
+		cost += cost_factor * _price.running_rail[rvi->running_cost_class];
 	} while ((v = GetNextVehicle(v)) != NULL);
 
 	return cost;