diff --git a/distribution/changelog.txt b/distribution/changelog.txt
index f5620ac4e8..fc7cabde30 100644
--- a/distribution/changelog.txt
+++ b/distribution/changelog.txt
@@ -1,5 +1,6 @@
 0.4.9 (in development)
 ------------------------------------------------------------------------
+- Fix: [#20907] RCT1/AA scenarios use the 4-across train for the Inverted Roller Coaster.
 
 0.4.8 (2024-02-04)
 ------------------------------------------------------------------------
diff --git a/src/openrct2/rct1/S4Importer.cpp b/src/openrct2/rct1/S4Importer.cpp
index 43b18981bb..52aaa31838 100644
--- a/src/openrct2/rct1/S4Importer.cpp
+++ b/src/openrct2/rct1/S4Importer.cpp
@@ -606,7 +606,7 @@ namespace RCT1
 
             if (_rideTypeToRideEntryMap[EnumValue(rideType)] == OBJECT_ENTRY_INDEX_NULL)
             {
-                auto entryName = RCT1::GetRideTypeObject(rideType);
+                auto entryName = RCT1::GetRideTypeObject(rideType, _gameVersion == FILE_VERSION_RCT1_LL);
                 if (!entryName.empty())
                 {
                     auto entryIndex = _rideEntries.GetOrAddEntry(entryName);
diff --git a/src/openrct2/rct1/T4Importer.cpp b/src/openrct2/rct1/T4Importer.cpp
index 89eaff9dbc..54447374c7 100644
--- a/src/openrct2/rct1/T4Importer.cpp
+++ b/src/openrct2/rct1/T4Importer.cpp
@@ -136,11 +136,10 @@ namespace RCT1
                 td->ride_mode = RideMode::PoweredLaunch;
             }
 
-            // Convert RCT1 vehicle type to RCT2 vehicle type. Initialise with a string consisting of 8 spaces.
             std::string_view vehicleObject;
             if (td4Base.Type == RideType::HedgeMaze)
             {
-                vehicleObject = RCT1::GetRideTypeObject(td4Base.Type);
+                vehicleObject = RCT1::GetRideTypeObject(td4Base.Type, false);
             }
             else
             {
diff --git a/src/openrct2/rct1/Tables.cpp b/src/openrct2/rct1/Tables.cpp
index 94fe3d2b58..f1907300b1 100644
--- a/src/openrct2/rct1/Tables.cpp
+++ b/src/openrct2/rct1/Tables.cpp
@@ -696,8 +696,12 @@ namespace RCT1
         return map[vehicleSubEntry];
     }
 
-    std::string_view GetRideTypeObject(RideType rideType)
+    std::string_view GetRideTypeObject(RideType rideType, bool isLL)
     {
+        if (rideType == RideType::InvertedRollerCoaster && !isLL) {
+            return "rct1.ride.inverted_trains";
+        }
+
         static constexpr const char * map[] =
         {
             "rct1.ride.wooden_rc_trains",            // RCT1_RIDE_TYPE_WOODEN_ROLLER_COASTER
diff --git a/src/openrct2/rct1/Tables.h b/src/openrct2/rct1/Tables.h
index d8291093f4..bf9a62ff8d 100644
--- a/src/openrct2/rct1/Tables.h
+++ b/src/openrct2/rct1/Tables.h
@@ -34,7 +34,7 @@ namespace RCT1
     uint8_t NormalisePathAddition(uint8_t pathAdditionType);
     uint8_t GetVehicleSubEntryIndex(uint8_t rct1VehicleType, uint8_t vehicleSubEntry);
 
-    std::string_view GetRideTypeObject(RideType rideType);
+    std::string_view GetRideTypeObject(RideType rideType, bool isLL);
     std::string_view GetVehicleObject(uint8_t vehicleType);
     std::string_view GetSmallSceneryObject(uint8_t smallSceneryType);
     std::string_view GetLargeSceneryObject(uint8_t largeSceneryType);